Cyril ELOUARD: Quantum measurement as a thermodynamic process
Cyril ELOUARD, Université de Lorraine, Nancy
Le résumé :
Quantum measurement is one of the most intriguing phenomena of quantum mechanics. The postulates of quantum mechanics predict a random dynamics of the measured system, such that quantum measurement is both a form of noise, but also a versatile tool for quantum control.
Notably, the measurement-induced dynamics can exhibit variations of both the energy and entropy of the system. It is therefore legitimate to consider it as a thermodynamic transformation.
I will give an overview of the conclusions and the research line which stem from this approach. I will first give some context regarding the field of quantum thermodynamics, which generalizes concepts from thermodynamics to quantum open systems, inspired by the framework of stochastic thermodynamics.
Then, I will give an overview of the behavior of the entropy and energy under quantum measurements, and some applications such as a measurement powered engine.
Finally, I will present lessons learnt from modeling the quantum measuring apparatus, in order to relate these entropy and energy transfers to the resource needed to perform the measurement.