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Investigation of energy exchanges at the quantum level

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General information

Reference : UMR9001-PASSEN-001
Workplace : PALAISEAU
Date of publication : Thursday, February 07, 2019
Scientific Responsible name : Pascale Senellart
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 May 2019
Proportion of work : Full time
Remuneration : 1 768,55 € gross monthly

Description of the thesis topic

Quantum thermodynamics is an emerging field that aims at solving problems of both fundamental and practical nature, addressing simple questions such as how to define heat, work and entropy production in the quantum regime? Is quantum coherence some energetic resource? What is the energetic cost of quantum information processing? Such open questions are essential to address, especially now that quantum technologies are rapidly progressing.

The objective of this internship/PhD work is to experimentally investigate evidences of quantum thermodynamic signatures related to the presence of coherence in a model quantum device. The project proposes to implement a quantum “engine” based on a single artificial atom (a semiconductor quantum dot) in a cavity coupled to a laser field. By placing a single atom in a cavity, one can control its coupling to light at will. Symetrically, the optical response of an incoming light field allows to measure the atomic qubit state very efficiently. This unique experimental configuration allows to detect energy exchanges between the light field and the atom at the sing le quantum level.

Work Context

This PhD work takes place within the ANR project Qu-Dice, where our team collaborates with the group of Alexia Auffeves (Institut Néel Grenoble) and Igor Dotesenko (Collège de France) to study quantum thermodynamics in cavity quantum electrodynamics systems. We welcome excellent students with solid training in quantum physics and a real taste for experimental studies and team work.

Constraints and risks

Optical measurements, lasers, cryogenics, fast electronics.

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