To find the right proposal !
Internship and thesis proposals
Criteria for selection
Number of proposals
30
1
Symmetries in non-Hermitian quantum systems: application to optimization of transport
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Fields theory/String theory
Nonequilibrium statistical physics
Quantum information theory and quantum technologies
Quantum optics
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Type of internship
Théorique, numérique Description
We are looking for a motivated PhD student to join the team of quantum dynamics and control, led by Prof. Aurelia Chenu, at the University of Luxembourg. See our group: chenulab.com
We aim to characterize the impact of Hamiltonian symmetries on dynamical effects, such as the transport of excitation. The group has expertise in non-Hermitian systems, open quantum systems, and quantum chaos. The successful candidate will look at networks representing non-Hermitian systems and identify the parameters that optimize dynamical properties. The project is purely theoretical, with numerical implementation. The project is broadly defined and can be shaped to the candidate’s interest.
We ask for:
• Excellent analytical and numerical skills;
• Solid knowledge of Quantum Mechanics;
• Strong motivation and creativity.
Applications will be processed upon arrival. The position will be closed when filled.
Contact
Aurelia Chenu
23/04/2024
/
Thesis :
Funding :
2
In search of equal-spin triplet superconductivity: doping MoS2 into the superconducting state
Domaines
Condensed matter
Low dimension physics
Nouveaux états électroniques de la matière corrélée
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
In conventional superconductors, Cooper pairs of electrons of opposite spin (i.e. singlet structure) form the ground state. Equal spin triplet pairs (ESTPs), as in superfluid 3He, are of great interest for superconducting spintronics and topological superconductivity. In (few-)monolayer superconducting NbSe2, odd-parity ESTPs have been predicted to arise from the non-colinearity between the out-of-plane Ising spin-orbit field (due to the lack of inversion symmetry in monolayer NbSe2) and an applied in-plane magnetic field. These ESTPs couple to the singlet order parameter at finite field.
We have recently seen preliminary evidence for these ESTPs in tunnel devices at high magnetic fields, in the magnetic field dependence of the superconducting energy gap. More striking spectral features ('mirage gaps') have been predicted for 2H-NbSe2 and TMDs of the same band structure (e.g. MoS2) when the material is doped close to the band edge. In addition to ESTP, recent experimental data on TMDs (including doped MoS2), have been interpreted as evidence for other unconventional superconducting phases, e.g. the finite-momentum ‘orbital FFLO’ state.
The intern will fabricate and measure MoS2 devices with solid state gates. S/he will fabricate contacts with electron-beam lithography and testing TMD contact to them, before proceeding to fabricate gates. S/he is welcome to participate in other work on TMDs going on in the NS2 group at the Laboratoire de Physique des Solides.
Contact
Charis Quay
15/02/2024
/
Thesis :
Funding :
3
Phases et polarisations singulières pour l’interaction quantique laser-atome
Domaines
Quantum optics/Atomic physics/Laser
Quantum information theory and quantum technologies
Non-linear optics
Type of internship
Expérimental et théorique Description
Les techniques actuelles permettent de façonner -à la carte- les lasers en intensité, en phase et en polarisation. Ainsi une phase en hélice produit un vortex optique; celui-ci transporte un moment angulaire orbital (OAM) qui est une grandeur quantique. Le vecteur optique quant à lui, est obtenu en façonnant la polarisation.
Ces singularités de phase ou de polarisation ouvrent vers de nouvelles interactions laser-matière liées au caractère quantique de l’OAM et de la polarisation, et trouvent des applications en quantique. : intrication, spectroscopie, turbulence optique, optique non linéaire, senseurs, etc.
Au LCPMR nos recherches concernent l’interaction de vortex et vecteurs optiques avec des atomes - chauds ou froids- pour créer des paires d’OAMs et les intriquer, pour observer l’évolution des vortex/vecteurs optiques en interaction résonante avec les atomes et pour réaliser des senseurs magnétiques.
Lors du stage l’étudiant se familiarisera avec les SLM (Spatial Light Modulator), créera des singularités et les caractérisera. Il pourra les appliquer à une vapeur de rubidium, placer celle-ci dans un environnement magnétique pour observer la transparence induite. Il pourra évoluer vers l’application à des atomes froids ou le couplage vecteur-vortex qui marie deux grandeurs quantiques du photon.
Le sujet ouvre sur une thèse liée aux aspects fondamentaux de ces lasers singuliers et leur utilisation.
Contact
Laurence Pruvost
04/02/2024
/
Thesis :
Funding :
4
Electromagnetic simulations for near field GHz spectrometer
Domaines
Condensed matter
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Théorique, numérique Description
The advances of circuit quantum electrodynamic (cQED) have enabled tremendous progress
both in the field of quantum computing and quantum sensors. It is now possible with such
circuits to detect accurately single photons in various range of frequencies, potentially
giving access to microscopic excitations in condensed matter systems.
However, the current tools are usually lacking spatiality and sensitivity. In that regard, in the
lab we are pursuing an endeavour to combine cQED methodology [1] with the latest
development in scanning probe techniques[2]. The idea would be to develop a scanning
nano-antenna to get access to single photon processes at the heart of condensed matter
systems with nanometer resolution.
The goal of this internship is to explore numerically different geometries of nano-antennas
and optimize the electromagnetic coupling with its environment at the relevant frequencies.
A first part of the internship will consist in designing and simulating this nano-antenna with
HFSS ANSYS. If time permits, you will be able to start the fabrication process by making
tips and on-chip antennas by state of the art lithography techniques. You will also participate
in the rest of the lab activities and discussion around the project.
The results of this internship will directly impact the design of future nanoantennas. It
requires creativity, rigor and a good understanding of classical electromagnetism.
Contact
Arthur Marguerite
12/01/2024
/
Thesis :
Funding :
5
Fully-funded Research Internships at Rice University, USA
Domaines
Condensed matter
Low dimension physics
Nouveaux états électroniques de la matière corrélée
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Non-equilibrium Statistical Physics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
The Smalley-Curl Institute at Rice University (in Houston, Texas, USA) has fully-funded research internship openings on a variety of projects. The list of the detailed description can be found in the attached PDF. To be considered for financial support, please email Alma Catala Luna (alma.catala@minesparis.psl.eu) , Jean-Francois Allemand (jean-francois.allemand@phys.ens.fr) and Yonglong Xie (yx71@rice.edu) with your CV and a ranked list of the top 3 projects you are interested in. If you have any questions, please email Yonglong Xie (yx71@rice.edu).
Contact
Yonglong Xie
08/12/2023
/
Thesis :
Funding :
6
Magic angle in graphene
Domaines
Condensed matter
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental et théorique Description
Condensed matter physicists used to associate new exotic properties to new materials development. In 2018 a paradigm shift happened with the observation of superconductivity in two layers of graphene with a relative crystallographic rotation of ~ 1.1 degrees, the so-called magic angle twisted bilayer graphene (MATBG). This unprecedented new knob to change properties of 2D materials is already showing a plethora of unexplored properties and leading to a universe of new technological applications in the new and fast growing field of twistronics (Twistronics: control of the electronic properties of 2D materials in a van der Waals heterostructure by changing their relative crystallographic alignment)
The unexpected behavior in MATBG is due to the existence of flat bands in its electronic band structure. These flat bands are the product of the interplay of interlayer tunneling and angle-induced momentum mismatch, which guarantees a large density of states and therefore an amplification of the effects of interactions. This causes correlated states which manifest experimentally by the emergence of new ground states such as superconductivity (SC), Mott insulators and quantum anomalous Hall effect (QAHE). In this internship, the student will fabricate such a device and perform electronic transport measurements (current and shot noise) to reveal its fundamental properties.
Contact
Preden Roulleau
17/11/2023
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Thesis :
Funding :
7
Analog time reversal processor for radiofrequency signals
Domaines
Quantum optics/Atomic physics/Laser
Quantum information theory and quantum technologies
Type of internship
Expérimental Description
Time reversal is a technique based on the invariance of the wave propagation equation in an inhomogeneous medium. It ensures spatial and temporal refocusing of a wave after having recorded the transmission channel signature. When the propagation medium is non-stationary, the transmission channel characteristics keep changing. The time-reversed signal must be sent as quickly as possible, otherwise the refocusing will not be effective. In the first demonstrations of time-reversal with RF waves, analog-to-digital converters (ADC) were used, limiting the processing bandwidth. In the aim of reaching the GHz regime, the latency time becomes problematic because of the limited sampling rate of ADCs. Conversely, a fully analog solution has the advantage of avoiding this conversion step.
At Institut Langevin, we design original analog architectures for processing optically-carried radiofrequency signals based on light-matter interaction in rare-earth ion-doped crystals. In particular we recently proposed an architecture able to generate controlled, time-reversed copies of arbitrary waveforms. The goal of the internship will be to advance the development of this time-reversal processor, first using arbitrary signals and then using real RF signals reverberated in a cavity.
Contact
Anne Louchet-Chauvet
Laboratory : Institut Langevin - UMR7587
Team : IL: NCIS (New Concepts for Imaging and Sensing)
Team Website
Team : IL: NCIS (New Concepts for Imaging and Sensing)
Team Website
15/11/2023
/
Thesis :
Funding :
8
Inertial sensing based on optomechanical coupling in rare-earth-doped crystals
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Quantum information theory and quantum technologies
Metrology
Type of internship
Expérimental Description
The realization of a cryogenic, broadband, high-sensitivity accelerometer is a major challenge in many physics domains, from quantum technologies to seismology and gravitational wave detection. In rare-earth ion-doped crystals, well known for their very narrow optical transitions at low temperatures, and increasingly used in quantum technologies, the energy levels are coupled to the mechanical stress of the host matrix via the crystal field around the ion.
We have recently demonstrated that this coupling can be exploited to provide a continuous optical measurement of the mechanical vibrations of a cryostat, with an already promising sensitivity and bandwidth. This measurement is based on the continuous interrogation of the optical transition with a monochromatic laser.
The internship will consist in pushing the development of this sensor to achieve an ultra-sensitive, unidirectional and calibrated accelerometer.
Contact
Anne Louchet-Chauvet
Laboratory : Institut Langevin - UMR7587
Team : IL: NCIS (New Concepts for Imaging and Sensing)
Team Website
Team : IL: NCIS (New Concepts for Imaging and Sensing)
Team Website
15/11/2023
/
Thesis :
Funding :
9
Antibunching effect and squeezed light in a cold atom ensemble
Domaines
Quantum optics/Atomic physics/Laser
Quantum optics
Non-linear optics
Type of internship
Expérimental Description
Cold atoms coupled to photons are a promising platform for quantum information,
computation and communication. The light radiated by a quantum emitter, such as an atom, generally features quantum correlations and squeezing , which are at the heart of many applications in quantum technologies. While antibunching is the key ingredient for single photon sources, squeezed light is an important tool for sub shot noise quantum sensing.
The goal on our experiment is to detect antibunching and squeezed light with many quantum emitters in a 3D system . This will be implemented and studied on our cold atom experiment, taking advantage of our experience with generating clouds of cold atoms with large optical thickness, a prerequisite for this project. The current collaboration with the group of Arno Rauschenbeutel will finally help to determine the experimental parameters needed to observe this antibunching effect.
Contact
Mathilde Hugbart
10/11/2023
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Thesis :
Funding :
10
Etude théorique et numérique de la transition quantique classique par une approche utilisant les marches aléatoires branchantes.
Domaines
Statistical physics
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Non-equilibrium Statistical Physics
Kinetic theory ; Diffusion ; Long-range interacting systems
Nuclear physics and Nuclear astrophysics
Type of internship
Théorique, numérique Description
Ce stage se propose d'explorer le lien entre l'équation de Schrödinger et la mécanique statistique des processus critiques, d'un point de vue théorique et numérique. Les développements formels -qui peuvent être vus comme l'étude de la quantification stochastique de Nelson dans le secteur non relativiste- s'appuieront sur des travaux relativement récents de Nagasawa et seront interprétés à la lumière de la théorie de l'onde pilote de Bohm. Les aspects numériques seront réalisés par une extension d'algorithmes de type "Diffusion Monte Carlo" du régime stationnaire au régime transitoire. On cherchera en particulier à reproduire numériquement le phénomène de "quantum carpet" avec ces outils, ainsi que la transition quantique/classique.
Contact
Eric Dumonteil
10/11/2023
/
Thesis :
Funding :
11
A non-quantum computer based on a coherent Ising machine
Domaines
Condensed matter
Statistical physics
Physics of liquids
Quantum Machines
Nonequilibrium statistical physics
Quantum optics
Non-equilibrium Statistical Physics
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
Quantum computing, and quantum-inspired computing, could be the new frontier in answering complex optimization problems that are historically unsolvable on classical computers. Today’s fastest computers may take millennia to conduct highly complex calculations (NP-hard problems), including combinatorial optimization problems involving many variables. The Coherent Ising Machine (CIM) is the most promising solution to date.
The aim of this project is to implement a CIM with water waves and controllable electrostriction. Using little modulated electric rod above the surface it is possible to create “spins” with arbitrary phase and positions. This project is experimental and aim to build this wave computer. It is possible to pursue with a funded thesis.
Contact
Emmanuel Fort
08/11/2023
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Thesis :
Funding :
12
Electronic properties of antimonene/graphene heterostructures
Domaines
Condensed matter
Low dimension physics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
2D materials are composed by single or few atomic layers and often display different physical properties with respect their bulk counterpart. Their properties can be tuned by strain, by changing the number of atomic layers or coupling them to other 2D materials. Two are the main objectives that drive this scientific field: (1) the fabrication and characterization of novel 2D materials which show novel properties and (2) the vertical stacking of different 2D crystals to form the so-called van der Walls heterostructures with the desired properties. Among the different 2D materails, antimonene is quite unique due to its strong spin-orbit interaction, which is one of the key ingredient of topological order of matter. In fact, antimonene become a 2D topological insulator when subjected to tensile strain. Strained antimonene develops Dirac cones in its electronic dispersion. We recently produced a strained antimonene layer showing a spin-splitted Dirac Cone due to spin-orbit interaction. The next step of our study will consist in coupling the electronic properties of antimonene to the one of a graphene layer and address the mutual interaction of Dirac electrons in the heterostructure. The internship will be focused on the optimization of the growth technique, in ultra-high vacuum conditions, and the in-situ characterization by angle resolved photoemission electron spectroscopy.
Contact
Sergio Vlaic
08/11/2023
/
Thesis :
Funding :
13
Coherent quantum emitter coupled to a nanophotonic waveguide
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Quantum optics
Non-linear optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
Photons have long been favored as carriers of information due to their non-interacting nature. Tradition- ally, atoms have served as the primary means to manipulate and process quantum information carried by photonic qubits. However, recent groundbreaking advancements in solid-state emitters such as color centers, quantum dots, and molecules have ushered in a new era of highly coherent interaction with light, akin to atomic-level interactions.
Moreover, the seamless integration of solid-state emitters into nanophotonic structures has unlocked the potential for achieving remarkably efficient light-matter interactions [1]. Amongst them, nanofibers have attracted attention due to their guided evanescent field that enables efficient coupling of emitters placed at their vicinity. This breakthrough not only facilitates the creation of high-performance single- photon sources but also enables the exciting prospect of photon-photon interactions[2].
Within the nanophotonic research team at LKB, we have cultivated expertise in the production of nanofiber waveguides and their precise coupling with solid-state emitters [3, 4]. This specialized focus empowers us to drive advances in single-photon quantum information processing
Contact
Quentin Glorieux
31/10/2023
/
Thesis :
Funding :
14
Trous noirs artificiels dans les fluides quantiques de lumi`ere
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Relativity/Astrophysics/Cosmology
Quantum optics
Non-linear optics
Quantum gases
Type of internship
Théorique, numérique Description
Les photons sont d'excellents porteurs d'information, mais ils n'interagissent généralement pas entre eux.
Les atomes interagissent, mais ils sont difficiles à manipuler et ne bénéficient pas de l'arsenal de l'optique quantique pour détecter les fluctuations quantiques et l'intrication.
Notre approche pour marier ces deux systèmes pour la simulation quantique consiste à utiliser des exciton-polaritons dans des microcavités semi-conductrices.
Notre équipe utilise cette plateforme pour simuler des effets astrophysiques à proximité de trous noirs artificiels, avec de la lumière.
Contact
Quentin Glorieux
25/10/2023
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Thesis :
Funding :
15
Artificial black holes in exciton-polariton fluids of light.
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Relativity/Astrophysics/Cosmology
Quantum optics
Non-linear optics
Quantum gases
Type of internship
Expérimental Description
Photons are great carriers of information but they usually don’t interact with one another.
Atoms interact but are hard to manipulate and do not benefit from the toolbox of quantum optics for detecting quantum fluctuations and entanglement.
Our approach to marry these two systems for quantum simulation is to use exciton-polaritons in semi-conductor microcavity.
Our team is using this platform to simulate astrophyics effects near artificial black holes with light.
Contact
Quentin Glorieux
25/10/2023
/
Thesis :
Funding :
16
Widely tunable ultra-stable and SI-traceable quantum cascade lasers for frequency metrology and mid- infrared precise spectroscopy: application to space, atmospheric and fundamental physics
Domaines
Quantum optics/Atomic physics/Laser
Metrology
Type of internship
Expérimental Description
Ultra-high resolution molecular spectroscopy is an interdisciplinary field with fascinating applications ranging from fundamental physics to astrophysics, earth sciences, remote sensing, metrology and quantum technologies. Among recent instrumental advances, the stabilization of quantum cascade lasers (QCLs) on optical frequency combs with traceability to primary frequency standards, a method recently implemented in our team, is a breakthrough technology. It offers an unprecedented level of precision in the mid-infrared, an essential region known as the molecular fingerprint region, which hosts a considerable number of intense vibrational signatures of molecules of various interests. This opens up prospects for carrying out fundamental physics tests and exploring the limits of the Standard Model, and for providing precise spectroscopic data on species of astrophysical or atmospheric interest, which is a crucial information for environmental and human health issues.
We have for instance recently measured rovibrational frequencies in methanol with 11-digits accuracy by carrying
out saturated absorption spectroscopy in a multi-pass cell and in a Fabry-Perot cavity enhanced spectroscopy, a
more than 4 orders of magnitude improvement compared to previous measurements reported in the literature.
Contact
Mathieu Manceau
24/10/2023
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Thesis :
Funding :
17
Precision Measurements and tests of fundamental physics with cold molecules
Domaines
Quantum optics/Atomic physics/Laser
Metrology
Type of internship
Expérimental Description
The master student will participate in the development of a new-generation molecular clock specifically designed
for precision vibrational spectroscopy of cold molecules in the gas phase. The proposed technology is at the
forefront of cold molecule research and frequency metrology, and opens possibilities for using polyatomic
molecules to perform tests of fundamental physics and explore the limits of the standard model. The apparatus will
be used in the first place for measuring the electroweak-interactions-induced tiny energy difference between
enantiomers of a chiral molecule, a signature of parity (left-right symmetry) violation, and a sensitive probe of dark
matter.
The master student will take an active role in various aspects of the developments of the experiment. She/he will:
- set up the mid-IR quantum cascade laser system at 6.4 μm to probe molecular vibrations in this spectral
region;
- perform first Doppler and sub-Doppler absorption spectroscopy on cold molecules produced at ~1 K in a
novel cold molecule apparatus, with a particular focus on well-chosen promising chiral and achiral organo-
metallic species and polycyclic aromatic hydrocarbons.
Contact
Mathieu Manceau
24/10/2023
/
Thesis :
Funding :
18
Quantum imaging with non-degenerated entangled photons
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Quantum information theory and quantum technologies
Quantum optics
Non-linear optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Metrology
Type of internship
Expérimental Description
Quantum imaging (QI) is a rapidly developing field of research with stunning progresses and emerging societal applications. Quantum-enhanced imaging schemes harness the beneficial properties of entangled photon pairs allowing transferring amplitude and phase information from one photon state to the other. The technique is however still in its infancy and we propose to go beyond the state of the art. The main goal is to develop advanced QI protocols that exploits photon pairs at extreme wavelengths from near infrared to the visible down to the deep UV using a non-classical source based on high harmonic generation (HHG). The main objective of the internship will consist in using a pair of non-degenerated entangled photons at 2 harmonics from the HHG frequency comb to perform a quantum imaging experiment in the far field regime. We will study the possibility of transferring the sensing and resolution benefit from one spectral range to another one. Indeed, an intriguing question is about the spatial resolution achievable in the QI scheme, especially in the case of non-degenerate photon pairs. The quantum correlations between the two photons from the same harmonic generation process will be used to transfer amplitude and phase information between the two photons. In the diffractive regime, and in a "ghost diffractive imaging" configuration based on the coincident detection of the two entangled photons.
Contact
Hamed Merdji
24/10/2023
/
Thesis :
Funding :
19
Evidence of multipartite entanglement in semiconductor high harmonic generation
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Nouveaux états électroniques de la matière corrélée
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Quantum information theory and quantum technologies
Quantum optics
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Non-linear optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Metrology
Type of internship
Expérimental Description
Quantum information science and imaging technologies reach some bottleneck due to limited scalability of non-classical sources. Future breakthroughs will rely on high production rate of various quantum states in scalable platforms. Generally, multipartite entanglement with N>2 suitable for quantum applications is difficult to achieve because of the low efficiency of the traditional schemes. Intrinsically, the HHG emission comes as a frequency comb and should exhibit N-partite entangled photons. Practically, the internship project will consist in extensively study the non-classical properties of the HHG process in a semiconductor for N>2. In the process, each emitted photon is a superposition of all frequencies in the spectrum, i.e., each photon is a comb so that each frequency component can be bunched and squeezed. The candidate will first develop and test entanglement and quantum correlations using the violation of Cauchy-Schwartz inequality. We will verify genuine multipartite entanglement of the photons in the time/frequency domain, by correspondingly measuring the longitudinal position as well as the frequency bandwidth. The approach will be further extended to verify multi-partite entanglement between even more optical modes. The Bell-like inequalities will therefore be generalized to witness entanglement between more than three mixed quantum states.
Contact
Hamed Merdji
24/10/2023
/
Thesis :
Funding :
20
Attosecond control of quantum states of light
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Quantum information theory and quantum technologies
Quantum optics
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Non-linear optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
High-harmonic generation is a light up-conversion process occurring in a strong laser field, leading to coherent attosecond bursts of extreme broadband radiation. As a new paradigm, attosecond electronic or photonic processes such as high-harmonic generation (HHG) can potentially generate non-classical states of light well before the decoherence of the system occurs. This could address fundamental challenges in quantum technology such as scalability, decoherence or the generation of massively entangled states with ultrafast processing. The internship will consist in realizing a platform that will allow controlling the carrier to envelope phase (CEP) of the laser that drives the semiconductor HHG emission. The CEP of the laser will allow controlling the non-classical state, in connection with our recent finding in various semiconductors (Theidel et al, submitted to Nature, in review). Single and multi-beam intensity cross-correlation, two-mode squeezing in the generated harmonic radiation, which depends on the laser intensity will be investigated. We will test the violation of the Cauchy-Schwarz inequality that realizes a direct test of multipartite entanglement in high-harmonic generation. The attosecond control of light states open the vision of quantum processing on unprecedented timescales, an evident perspective for future quantum optical computers. Only candidates motivated to follow with a PhD in this topic will be considered.
Contact
Hamed Merdji
24/10/2023
/
Thesis :
Funding :
21
Créer de la matière artifielle à base de photons dans un Fluide Quantique de Lumière
Domaines
Condensed matter
Nonequilibrium statistical physics
Quantum information theory and quantum technologies
Quantum optics
Non-linear optics
Quantum gases
Type of internship
Expérimental Description
Les photons sont d’excellents porteurs d’information, mais ils n’interagissent généralement pas les uns
avec les autres. Les atomes interagissent, mais ils sont difficiles à manipuler et ne bénéficient pas de
l’arsenal de l’optique quantique pour d´etecter les fluctuations quantiques et l’intrication. De nombreuses
approches ont été proposées pour marier ces deux systèmes en vue de simuler de la matière
condensée avec des photons fortement interagissant, mais à ce jour, la réalisation de matériaux
synthétiques composés de photons fait encore d´efaut.
Notre équipe vise cet objectif ambitieux, à savoir la création de Matiere Photonique Synthétique.
Nous proposons une opportunité de stage (suivie d'une thèse financée par l'ERC) pour étendre les capacités de notre plateforme à un nouveau niveau en augmentant de plusieurs ordres de grandeur les interactions effectives photon-photon et en entrant dans le régime des interactions fortes.
Contact
Quentin Glorieux
23/10/2023
/
Thesis :
Funding :
22
Synthetic Photonic Matter in a Quantum Fluid of Light.
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Statistical physics
Nonequilibrium statistical physics
Quantum optics
Non-linear optics
Non-equilibrium Statistical Physics
Hydrodynamics/Turbulence/Fluid mechanics
Quantum gases
Type of internship
Expérimental et théorique Description
Photons are great carriers of information but they usually don’t interact with one another. Atoms interact but are hard to manipulate and do not benefit from the toolbox of quantum optics for detecting quantum fluctuations and entanglement. Many approaches have been proposed to marry these two systems for quantum simulation of condensed matter with strongly interacting photons, but to date, the realization of large-scale synthetic materials made of optical photons is still missing.
Our team targets this exciting goal, namely the creation of Synthetic Photonic Matter.
We are offering an internship opportunity (followed by an ERC-funded PhD) to expand the capabilities of this platform to a new level by increasing by many orders of magnitude the effective photon-photon interactions and enter the strong interaction regime.
Contact
Quentin Glorieux
23/10/2023
/
Thesis :
Funding :
23
Experimental realization of quantum-squeezed states of light using optically-levitated nano-objects.
Domaines
Quantum optics/Atomic physics/Laser
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Quantum optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
During this internship, the student will experimentally setup an optomechanical platform consisting of a nanoparticle optically levitated in vacuum. Through a spatial modulation of the input light field, a mechanically-induced correlation between phase and amplitude fluctuations of the optical field will be enforced. Such a correlation will be maximized to achieve a quantum squeezing of the scattered light field. A funding is available to continue and expand this internship through a PhD.
Contact
Nicolas Bachelard
Laboratory : Laboratoire Ondes et Matière d'Aquitaine - UMR 5798
Team : Nanophotonics Group
Team Website
Team : Nanophotonics Group
Team Website
20/10/2023
/
Thesis :
Funding :
24
Quantum chaos & non-Euclidean photonics
Domaines
Quantum optics/Atomic physics/Laser
Relativity/Astrophysics/Cosmology
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Type of internship
Expérimental et théorique Description
Quantum chaos is a research field dedicated to the relationship between a quantum system and its classical counterpart. The predictions are investigated in any wave system, namely quantum, acoustic, microwaves, optics,… Recently, we demonstrated the fabrication of surface-like microlasers by Direct Laser Writing (DLW). The laser modes were located along periodic geodesics (a geodesic is the shortest path between two points on a surface, like the straight line in Euclidean space). It opens the way to a new domain, called Non-Euclidean Photonics. During the internship, the student will investigate microlasers based on a pseudosphere, a surface with constant negative curvature , where geodesics are unstable and the classical dynamics is chaotic.
Contact
Mélanie Lebental
20/10/2023
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Thesis :
Funding :
25
Computational fluorescence microscopy
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Statistical physics
Biophysics
Soft matter
Physics of living systems
Quantum information theory and quantum technologies
Quantum optics
Non-linear optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental et théorique Contact
Hilton Barbosa de Aguiar
19/10/2023
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Thesis :
Funding :
26
Super-resolution coherent Raman microspectroscopy
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Statistical physics
Biophysics
Soft matter
Physics of living systems
Quantum information theory and quantum technologies
Quantum optics
Non-linear optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental et théorique Contact
Hilton Barbosa de Aguiar
19/10/2023
/
Thesis :
Funding :
27
Time-domain in compressive Raman microspectroscopy
Domaines
Quantum optics/Atomic physics/Laser
Condensed matter
Biophysics
Soft matter
Physics of living systems
Quantum optics
Non-linear optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental et théorique Contact
Hilton Barbosa de Aguiar
19/10/2023
/
Thesis :
Funding :
28
Dynamique et statistique de lancers de dés 2d
Domaines
Nonequilibrium statistical physics
Non-equilibrium Statistical Physics
Type of internship
Expérimental Description
[Français] La dynamique d’un dé (ou de n’importe quel polyèdre) tombant sur une surface est constitué d’une alternance
complexe de mouvements réguliers et de chocs dissipatifs, dont il est difficile de dégager des propriétés moyennes.
En particulier si les faces du dé ont des aires différentes, la répartition statistique des configurations finales n’est
à l’heure actuelle pas comprise.
L’objectif de ce stage de recherche en laboratoire sera d’étudier la dynamique de chute d’un ‘dé’ bidimension-
nel (confiné entre deux plaques) et de faire le lien avec la répartition statistique d’un grand nombre de lancers.
Selon l'affinité de l'étudiant·e, les expériences pourront être complétées par de la modélisation et/ou une étude numérique.
[English] Although the dynamics of a die (or any polyhedron) falling onto a surface involves only basic mechanics (rigid
body, rebounds, sliding), its complex out-of-equilibrium dynamics makes predicting statistical behaviour far
from obvious. In particular, if the faces of the die have different areas, the statistical distribution of the
results obtained is not currently understood.
The aim of this laboratory research internship will be to examine the fall of a two-dimensional ‘die’ (confined
between two plates) and to make the link with the statistics of the final state. While our first aim will be to gather experimental data, interested students may well add some theoretical modeling and/or numerical simulations.
Contact
Adrian Daerr
19/10/2023
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Thesis :
Funding :
29
NbN thin film synthesis and characterization
Domaines
Condensed matter
Low dimension physics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
Niobium nitride (NbN) is a very interesting material both for its fundamental properties but also for applications in quantum technologies. It is a superconducting material with a relatively “high” critical temperature (up to 13 K) and the transition temperature can be tuned with the thickness of the film. All this makes it a promising candidate for a wide variety of quantum technology applications without the need for a dilution refrigerator. Recently it has been used for magnetic imaging at “high” temperature, to make high quality resonators for circuit QED, high range cryogenic thermometers and single photon detectors.
In the lab we have been developing a NbN magnetron deposition systems that will produce such superconducting films for different team in the group. Your task during this internship will be to make such high quality NbN films, to develop reliable deposition protocols and characterize the resulting films. The characterization will be electronic (transport), optical (reflectometry and ellipsometry) and also topographic (AFM). Depending on the progress made, you will be involved in the fabrication of quantum circuits made out of these films.
This internship will give you direct hands-on experience on a wide range of experimental techniques that are widely used in condensed matter and quantum technologies (ultra-high vacuum, cryogenic, DC transport, film deposition, ellipsometry, AFM).
Contact
Arthur Marguerite
12/10/2023
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Thesis :
Funding :
30
Growth and spintronics of low symmetry magnetic layers
Domaines
Condensed matter
Type of internship
Expérimental et théorique Description
The goal of this internship is to realize ultrathin films of metallic and magnetic layers on insulating substrates of very low symmetry. The samples will be made in the clean room of the Matériaux et Phénomènes Quantiques lab in Paris and characterized by x-ray diffraction and vibrating sample magnetometry or magneto-optical effects for their magnetic properties. The second part of the internship will be to achieve lithography and electronic transport measurements on those samples for magnetic memory applications. This part will be done in part in Singapore, in collaboration with Pr. Yang's group, at the Computer and Electrical Engineering departement of the National University of Singapore.
Contact
Vincent Repain
09/10/2023
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Thesis :
Funding :