Necessity of feedback control for the quantum Maxwell demon in a finite-time steady feedback cycle.

Koshihara, Kenta; Yuasa, Kazuya · Phys Rev E · 2022

basic_science · Level V

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Abstract

We revisit quantum Maxwell demon in thermodynamic feedback cycle in the steady-state regime. We derive a generalized version of the Clausius inequality for a finite-time steady feedback cycle with a single heat bath. It is shown to be tighter than previously known ones, and allows us to clarify that feedback control is necessary to violate the standard Clausius inequality.