bibkey: faist2015gibbspreserving
authors: Philippe Faist; Jonathan Oppenheim; Renato Renner
year: 2015
title: Gibbs-Preserving Maps outperform Thermal Operations in the quantum regime
doi: 10.1088/1367-2630/17/4/043003
url: https://arxiv.org/abs/1406.3618
claim: Preserving a Gibbs state is insufficient to characterize energy-conserving thermal operations on coherent quantum states.
strata_touched:
  - D5/S3/Quantum/Dynamics/HamiltonianEffectCompletionGenerator
license: citation-only
triage: anchor

A thermal reference condition is not a work-cost certificate

The four-page arXiv PDF was read. The first page was visually checked. The definitions of thermal operations and Gibbs-preserving maps, the qubit example in equations (1)-(3), and the discussion of time-reference resources were inspected in the parsed text.

The unified theory’s channel R maps a visible Gibbs marginal to a correlated joint Gibbs state and preserves chosen label populations. This establishes calibration in that explicitly defined channel class. It does not establish an energy-conserving unitary dilation with a free heat bath, a zero-work implementation, or a lower bound on dissipated heat.

The paper is a boundary condition on physical interpretation. General CPTP realizability, Hamiltonian covariance, and thermodynamic resource cost remain distinct requirements. Its state-conversion discussion for classical diagonal states must not be enlarged into equality of all classical channel implementations.