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arXiv · 1602.04616

Quantum Trajectory Thermodynamics with Discrete Feedback Control

Zongping Gong·Yuto Ashida·Masahito Ueda
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Abstract

We employ the quantum jump trajectory approach to construct a systematic framework to study the thermodynamics at the trajectory level in a nonequilibrium open quantum system under discrete feedback control. Within this framework, we derive quantum versions of the generalized Jarzynski equalities, which are demonstrated in an isolated pseudospin system and a coherently driven two-level open quantum system. Due to quantum coherence and measurement backaction, a fundamental distinction from the classical generalized Jarzynski equalities emerges in the quantum versions, which is characterized by a large negative information gain reflecting genuinely quantum rare events. A possible experimental scheme to test our findings in superconducting qubits is discussed.

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BibTeXRIS

Zongping Gong, Yuto Ashida, Masahito Ueda. 2016-02-15. Quantum Trajectory Thermodynamics with Discrete Feedback Control. https://doi.org/10.1103/physreva.94.012107

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