Quantum thermodynamics, quantum correlations and quantum coherence in accelerating Unruh-DeWitt detectors in both steady and dynamical state

TL;DR

This paper explores how quantum correlations and coherence influence thermodynamics and engine efficiency in Unruh-DeWitt detectors, highlighting the effects of environment memory and initial states on quantum resource dynamics.

Contribution

It provides a comprehensive analysis of quantum resources in accelerating detectors, revealing how non-Markovian effects can enhance quantum correlations and thermodynamic performance.

Findings

Non-Markovian dynamics preserve quantum correlations better.

Quantum coherence impacts heat engine efficiency.

Memory effects improve thermodynamic performance.

Abstract

We investigate the interplay between quantum thermodynamics, quantum correlations, and quantum coherence within the framework of the Unruh-DeWitt (UdW) detector model. By analyzing both the steady and dynamical states of various quantum resources (including steerability, entanglement, quantum discord, and coherence), we study how these resources evolve under Markovian and non-Markovian environments. Furthermore, we investigate the impact of both the Unruh temperature and the energy levels on three key quantum phenomena: thermodynamic evolution, quantum correlations, and quantum coherence, considering different initial state preparations. The hierarchical structure relating quantum correlations and quantum coherence is determined. We further examine the thermodynamic performance of a quantum heat engine, highlighting the influence of memory effects and classical correlations on heat exchange, work extraction, and efficiency. Our results reveal that non-Markovian dynamics can enhance the preservation of quantum correlations and improve the engine's efficiency compared to purely Markovian regime. These findings provide insights into the role of quantum correlations and quantum coherence in quantum thermodynamic processes and open avenues for optimizing quantum devices operating in relativistic or open-system settings.