2020/02/29 by Paul M. Riechers, Mile Gu
Computer Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Coherence (philosophical gambling strategy) #Dissipation #Dissipative system #Entropy (arrow of time) #Entropy production #Non-equilibrium thermodynamics #Open quantum system #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum decoherence #Quantum dissipation #Quantum dynamics #Quantum mechanics #Quantum process #Quantum system #Quantum thermodynamics #Statistical physics #Thermodynamic equilibrium #Thermodynamic system #cond-mat.mes-hall #cond-mat.stat-mech #quant-ph
paper · pdf · doi:10.1103/physreve.103.042145
published as Phys. Rev. E 103, 042145 (2021) · 6 pages plus 14 pages of appendices, 1 figure
arxiv created 2021/02/25 · openalex publication_date 2021/04/30 · arxiv updated 2021/05/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Exact results about the nonequilibrium thermodynamics of open quantum systems at arbitrary timescales are obtained by considering all possible variations of initial conditions of a system. First we obtain a quantum-information theoretic equality for entropy production, valid for an arbitrary initial joint state of system and environment. For any finite-time process with a fixed initial environment, we then show that the system's loss of distinction-relative to the minimally dissipative state-exactly quantifies its thermodynamic dissipation. The quantum component of this dissipation is the change in coherence relative to the minimally dissipative state. Implications for quantum state preparation and local control are explored. For nonunitary processes-like the preparation of any particular quantum state-we find that mismatched expectations lead to divergent dissipation as the actual initial state becomes orthogonal to the anticipated one.