Quantumness Speeds up Quantum Thermodynamics Processes

TL;DR

This paper introduces a new thermodynamic speed measure to quantify how quantum coherence and entanglement enhance work extraction, offering a novel way to witness entanglement without state tomography.

Contribution

It proposes a thermodynamic speed concept that links quantum coherence and entanglement to faster work extraction, advancing quantum thermodynamics theory.

Findings

Quantum coherence can accelerate work extraction beyond incoherent states.

Genuine entanglement can further speed up work extraction beyond bi-separable states.

The method provides a way to witness entanglement without state tomography.

Abstract

Quantum thermodynamic process involves manipulating and controlling quantum states to extract energy or perform computational tasks with high efficiency. There is still no efficientgeneral method to theoretically quantify the effect of the quantumness of coherence and entanglement in work extraction. In this work, we propose a thermodynamics speed to quantify theextracting work. We show that the coherence of quantum systems can speed up work extractingwith respect to some cyclic evolution beyond all incoherent states. We further show the genuine entanglement of quantum systems may speed up work extracting beyond any bi-separablestates. This provides a new thermodynamic method to witness entangled systems without statetomography.