Thermodynamic decoupling in the deep-strong coupling regime

• URL: http://arxiv.org/abs/2510.20969v1
• Date: Thu, 23 Oct 2025 19:56:51 GMT
• Title: Thermodynamic decoupling in the deep-strong coupling regime
• Authors: S. Palafox, M. Salado-Mejía, M. Santiago-García, R. Román-Ancheyta,
• Abstract summary: In the deep-strong coupling regime, the interaction between light and matter exceeds their bare frequencies, leading to an effective decoupling.<n>We show that the associated heat current, a key nonlocal observable in any quantum thermal machine, also approaches zero in this extreme coupling scenario.<n>Our results indicate that the decoupling is a more general feature of the DSC regime, with implications for quantum thermotronics.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In the deep-strong coupling (DSC) regime, the interaction between light and matter exceeds their bare frequencies, leading to an effective decoupling. Theoretical and experimental evidence for this behavior has relied solely on measurements of local observables at equilibrium. However, such a local approach is insufficient to accurately describe energy fluxes in critical and nonequilibrium phenomena. Here, we use a two-terminal quantum junction to derive a thermodynamically consistent global master equation. We demonstrate that the associated heat current, a key nonlocal observable in any quantum thermal machine, also approaches zero in this extreme coupling scenario, underscoring the role of virtual photons in the vacuum ground state. Our results indicate that the decoupling is a more general feature of the DSC regime, with implications for quantum thermotronics.

Related papers

• Pseudogap in a Fermi-Hubbard quantum simulator [33.741138736466986]
  Understanding doped Mott insulators is a fundamental goal in condensed matter physics, with relevance to cuprate superconductors and other quantum materials.<n>Here we observe a crossover between a normal metal and a pseudogapped metal in the Hubbard model by performing thermodynamic and spectroscopic measurements in a cold atom quantum simulator.<n>Our results experimentally demonstrate the existence of a pseudogapped metal in the Hubbard model, partially characterize the pseudogap regime, and suggest a link between the pseudogap and charge order which can be probed in future work.
  arXiv  Detail & Related papers  (2025-09-22T17:55:08Z)
• Heating Dynamics of Correlated Fermions under Dephasing [0.0]
  We study the dissipative dynamics of correlated fermions evolving in presence of a local dephasing bath.<n>We show that the dissipative dynamics describes heating towards infinite temperature, with a relaxation rate that depends strongly on interaction.
  arXiv  Detail & Related papers  (2025-07-29T13:40:51Z)
• Strong-coupling quantum thermodynamics using a superconducting flux qubit [3.391674777083244]
  We show experimental evidence of strong coupling by observing a hybridized state of the qubit with two cavities coupled to it.<n>We also demonstrate close to 100% on-off ratio of heat current mediated by photons by applying magnetic flux to the qubit.<n>Our experiment opens new possibilities for quantum thermodynamics, aiming to realize true quantum heat engines and refrigerators with enhanced power and efficiency.
  arXiv  Detail & Related papers  (2024-11-16T11:20:05Z)
• Chiral quantum heating and cooling with an optically controlled ion [15.029218109713296]
  Quantum heat engines and refrigerators are open quantum systems, whose dynamics can be well understood using a non-Hermitian formalism. We demonstrate, using a Paul-trapped ultracold ion, the first chiral quantum heating and refrigeration by dynamically encircling a closed loop. Our experiments have revealed that not only the adiabaticity-breakdown but also the Landau-Zener-St"uckelberg process play an essential role during dynamic encircling.
  arXiv  Detail & Related papers  (2024-05-29T09:31:55Z)
• Full counting statistics and coherences: fluctuation symmetry in heat transport with the Unified quantum master equation [0.0]
  We investigate statistics of energy currents through open quantum systems with nearly degenerate levels. We find that maintaining coherences between nearly degenerate levels is essential for the properly capturing the current and its cumulants.
  arXiv  Detail & Related papers  (2022-12-21T19:01:52Z)
• Exact Solution for A Real Polaritonic System Under Vibrational Strong Coupling in Thermodynamic Equilibrium: Absence of Zero Temperature and Loss of Light-Matter Entanglement [0.0]
  First exact quantum simulation of a real molecular system (HD$+$) under strong ro-vibrational coupling to a quantized optical cavity mode in thermal equilibrium is presented.
  arXiv  Detail & Related papers  (2022-08-02T09:21:52Z)
• Fast Thermalization from the Eigenstate Thermalization Hypothesis [69.68937033275746]
  Eigenstate Thermalization Hypothesis (ETH) has played a major role in understanding thermodynamic phenomena in closed quantum systems. This paper establishes a rigorous link between ETH and fast thermalization to the global Gibbs state. Our results explain finite-time thermalization in chaotic open quantum systems.
  arXiv  Detail & Related papers  (2021-12-14T18:48:31Z)
• Open-system approach to nonequilibrium quantum thermodynamics at arbitrary coupling [77.34726150561087]
  We develop a general theory describing the thermodynamical behavior of open quantum systems coupled to thermal baths. Our approach is based on the exact time-local quantum master equation for the reduced open system states.
  arXiv  Detail & Related papers  (2021-09-24T11:19:22Z)
• Taking the temperature of a pure quantum state [55.41644538483948]
  Temperature is a deceptively simple concept that still raises deep questions at the forefront of quantum physics research. We propose a scheme to measure the temperature of such pure states through quantum interference.
  arXiv  Detail & Related papers  (2021-03-30T18:18:37Z)
• Evolution of a Non-Hermitian Quantum Single-Molecule Junction at Constant Temperature [62.997667081978825]
  We present a theory for describing non-Hermitian quantum systems embedded in constant-temperature environments. We find that the combined action of probability losses and thermal fluctuations assists quantum transport through the molecular junction.
  arXiv  Detail & Related papers  (2021-01-21T14:33:34Z)
• Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations [77.34726150561087]
  The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems. Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations. Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
  arXiv  Detail & Related papers  (2020-07-20T18:00:02Z)
• Out-of-equilibrium quantum thermodynamics in the Bloch sphere: temperature and internal entropy production [68.8204255655161]
  An explicit expression for the temperature of an open two-level quantum system is obtained. This temperature coincides with the environment temperature if the system reaches thermal equilibrium with a heat reservoir. We show that within this theoretical framework the total entropy production can be partitioned into two contributions.
  arXiv  Detail & Related papers  (2020-04-09T23:06:43Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.