Entropic equality for worst-case work at any protocol speed
Dahlsten, O.C.O Choi, M.-S Braun, D Garner, A.J.P Halpern, N.Y Vedral, V
Dahlsten, O.C.O
Choi, M.-S
Braun, D
Halpern, N.Y
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Alternative Title
Abstract
We derive an equality for non-equilibrium statistical mechanics in finite-dimensional quantum systems. The equality concerns the worst-case work output of a time-dependent Hamiltonian protocol in the presence of a Markovian heat bath. It has the form 'worst-case work = penalty - optimum'. The equality holds for all rates of changing the Hamiltonian and can be used to derive the optimum by setting the penalty to 0. The optimum term contains the max entropy of the initial state, rather than the von Neumann entropy, thus recovering recent results from single-shot statistical mechanics. Energy coherences can arise during the protocol but are assumed not to be present initially. We apply the equality to an electron box. © 2017 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Keywords
Entropy, Hamiltonians, Quantum optics, Quantum theory, Statistical mechanics, Crooks fluctuation theorem, Finite-dimensional quantum systems, Initial state, Max entropy, Non-equilibrium statistical mechanics, Single shots, Time-dependent Hamiltonians, Von Neumann entropy, Mechanics
Source Title
New Journal of Physics
Publisher
Institute of Physics Publishing
Series/Report No.
Collections
Rights
Attribution 4.0 International
Date
2017
DOI
10.1088/1367-2630/aa62ba
Type
Article