Quantum heat current in Terahertz-driven phonon systems

• URL: http://arxiv.org/abs/2512.17669v1
• Date: Fri, 19 Dec 2025 15:13:26 GMT
• Title: Quantum heat current in Terahertz-driven phonon systems
• Authors: Yulong Qiao, Richard. Matthias Geilhufe,
• Abstract summary: We investigate the ultrafast quantum thermodynamics of optical phonon mode driven by a THz pulse.<n>Our results provide a pathway to probe and control non-Markovian dissipation in driven solid-state systems.
• Score: 0.6875312133832078
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The advent of high-intensity ultrafast laser pulses has opened new opportunities for controlling and designing quantum materials. In particular, terahertz (THz) pulses can resonantly drive optical phonon modes, enabling dynamic manipulation of lattice degrees of freedom. In this work, we investigate the ultrafast quantum thermodynamics of optical phonon mode driven by a THz pulse by treating the phonon as an open quantum system coupled to a thermal environment within a Caldeira-Leggett-type framework. We derive the quantum heat current between the phonon and the bath and analyze its behavior under realistic pulse protocols. Our results demonstrate that ultrafast laser driving can reveal and even induce significant deviations from the commonly adopted Markovian approximation, thereby providing a pathway to probe and control non-Markovian dissipation in driven solid-state systems.

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