Théorique, numérique
The purpose of this master thesis is to study (theory + numerics) the phase transition between locked and running states of a rotating nanoobject, trapped in an optical tweezer in vacuum, and submitted to the fluctuating force and torques of the trapping light field. In this quantum back-action regime, the fluctuation of the trapping beam exert a strong action on the motion, and re-heat the particle. Using classical and quantum Langevin equations, the intern will model the (random) motion of the particle, and quantify the possibility to make a sensor for tiny forces and / or torques. The internship is paid, is purely theoretical and numerical but will be done in close connection with our experimental team. A pH-D might be proposed at the end.