Quantumness speeds up quantum thermodynamics processes

Ming-Xing Luo

doi:10.1016/j.isci.2024.109722

Quantumness speeds up quantum thermodynamics processes

iScience. 2024 Apr 12;27(5):109722. doi: 10.1016/j.isci.2024.109722. eCollection 2024 May 17.

Author

Ming-Xing Luo^{1

2}

Affiliations

¹ School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China.
² CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei 230026, China.

Abstract

Quantum thermodynamic process involves manipulating and controlling quantum states to extract energy or perform computational tasks with high efficiency. There is still no efficient general 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 the extracting work. We show that the coherence of quantum systems can speed up work extracting with 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-separable states. This provides a new thermodynamic method to witness entangled systems with physical quantities.

Keywords: Physics; Quantum physics; Quantum theory.