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Trapped Ion Quantum Computing Quantum Thermodynamics

An Information-Theoretic Bound on Thermodynamic Efficiency and the Generalized Carnot's Theorem

arXiv
Authors: Anna Gabetti, Fabrizio Dolcini, Davide Girolami

Year

2026

Paper ID

48969

Status

Preprint

Abstract Read

~2 min

Abstract Words

105

Citations

0

Abstract

We derive a bound on the efficiency of thermal engines that can be sharper than Carnot's limit. It is a function of statistical correlations between the engine internal state and Hamiltonian, can be saturated even in finite-time cycles, and applies to both classical and quantum engines. Specifically, the bound establishes the exact maximal efficiency of engines operating with multiple baths, tightening the upper limit set by Carnot's theorem. Then, we show that an engine made of a quantum dot coupled with fermionic baths can achieve the bound, even when operating beyond the quasistatic regime. The result provides a design principle for realistic energy harvesting machines.

Why This Paper Matters

  • This paper contributes to the Quantum Thermodynamics research area in the Quantum Articles archive.
  • It adds a 2026 reference point for readers tracking recent quantum research.
  • We derive a bound on the efficiency of thermal engines that can be sharper than Carnot's limit.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2604.10762 [2] arXiv https://arxiv.org/abs/2604.10762 [3] Publisher https://arxiv.org/abs/2604.10762

Local Citation Graph (Related-Paper Links)

Current Paper #48969 #69039 SAT, MaxSAT, and SMT for QLDPC ... #69038 Physically Constrained Ensemble... #69023 Scalable Quantum Algorithms for... #69016 Solution of the Equation-of-Mot...

External citation index: OpenAlex citation signal • updated 2026-06-13 23:32:27

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