Phonon heat transport with squeezing-based symmetry breaking
- URL: http://arxiv.org/abs/2607.22990v1
- Date: Sat, 25 Jul 2026 02:04:56 GMT
- Title: Phonon heat transport with squeezing-based symmetry breaking
- Abstract summary: We introduce a novel mechanism using quantum squeezing in a cavity optomechanical system.<n>We reveal that heat flow under a constant temperature gradient can be deterministically amplified, reduced, or even reversed.<n>Our results establish quantum squeezing as a versatile platform for on-demand phononic thermal control, opening avenues for active heat management in quantum devices and thermal logic circuits.
- Score: 16.03924007968566
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The controllability of phonon thermal transport is fundamental for numerous technologies, from cooling high-performance chips to managing heat in quantum computing. Despite extensive efforts, on-demand, real-time control of phonon heat flow remains elusive, being fundamentally constrained by the temperature gradient. Here we achieve this long-sought phonon heat transport by introducing a novel mechanism using quantum squeezing in a cavity optomechanical system. We find that phonon squeezing of near-ground-state mechanical resonators via an optomechanically induced parametric process breaks the continuous U(1) rotation symmetry in phase space, and consequently the symmetry in the heat current structure. We reveal that heat flow under a constant temperature gradient can be deterministically amplified, reduced, or even reversed, a capability previously unattainable. With phonon squeezing, we achieve over twentyfold amplification of heat flow and reversal within 30 milliseconds. Importantly, quantum discord analysis reveals a direct connection between heat flow reversal and quantum correlation. Our results establish quantum squeezing as a versatile platform for on-demand phononic thermal control, opening avenues for active heat management in quantum devices and thermal logic circuits.
Related papers
- Heat, work, and fluctuations in a driven quantum resonator [1.849691543273889]
In nanoscale heat engines, the working fluid can be a quantum system whose behavior and dynamics are non-classical.<n>Here, we investigate the thermodynamic properties of a driven quantum resonator whose temperature is controlled by modulating its natural frequency.<n>Our results provide quantitative insights into the interplay between heat, work, and fluctuations, and may help in designing future heat engines.
arXiv Detail & Related papers (2026-01-16T18:03:06Z) - Heat measurement of quantum interference [35.638905508510135]
coherence plays a key role in the operation and performance of quantum heat engines and refrigerators.<n>We measure quantum features in the heat transfer between a qubit and a thermal bath in a system formed of a driven flux qubit galvanically coupled to a $lambda/4$ coplanar-waveguide resonator.
arXiv Detail & Related papers (2025-10-27T07:55:23Z) - Heat operator approach to quantum stochastic thermodynamics in the strong-coupling regime [0.0]
We identify a 'heat operator,' whose moments with respect to the vacuum state correspond to the moments of the heat exchanged with a thermal bath.<n>This recasts the statistics of heat statistics as a standard unitary time-evolution problem.<n>We exploit the chain mapping of thermodynamic reservoirs to compute heat fluctuations in the Ohmic spin-boson model.
arXiv Detail & Related papers (2025-04-14T18:26:45Z) - 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) - Thermalization and Criticality on an Analog-Digital Quantum Simulator [133.58336306417294]
We present a quantum simulator comprising 69 superconducting qubits which supports both universal quantum gates and high-fidelity analog evolution.
We observe signatures of the classical Kosterlitz-Thouless phase transition, as well as strong deviations from Kibble-Zurek scaling predictions.
We digitally prepare the system in pairwise-entangled dimer states and image the transport of energy and vorticity during thermalization.
arXiv Detail & Related papers (2024-05-27T17:40:39Z) - Quantum refrigeration powered by noise in a superconducting circuit [0.0]
We demonstrate a novel quantum thermal machine that leverages noise-assisted quantum transport to fuel a cooling engine in steady state.
The device exploits symmetry-selective couplings between a superconducting artificial molecule and two microwave waveguides.
By varying the relative temperatures of the reservoirs, and measuring heat currents with a resolution below 1 aW, we demonstrate that the device can be operated as a quantum heat engine, thermal accelerator, and refrigerator.
arXiv Detail & Related papers (2024-03-05T23:48:28Z) - Limits for coherent optical control of quantum emitters in layered
materials [49.596352607801784]
coherent control of a two-level system is among the most essential challenges in modern quantum optics.
We use a mechanically isolated quantum emitter in hexagonal boron nitride to explore the individual mechanisms which affect the coherence of an optical transition under resonant drive.
New insights on the underlying physical decoherence mechanisms reveals a limit in temperature until which coherent driving of the system is possible.
arXiv Detail & Related papers (2023-12-18T10:37:06Z) - Demonstrating Quantum Microscopic Reversibility Using Coherent States of
Light [58.8645797643406]
We propose and experimentally test a quantum generalization of the microscopic reversibility when a quantum system interacts with a heat bath.
We verify that the quantum modification for the principle of microscopic reversibility is critical in the low-temperature limit.
arXiv Detail & Related papers (2022-05-26T00:25:29Z) - 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) - 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) - Quantifying the quantum heat contribution from a driven superconducting
circuit [0.0]
We propose a two-reservoir setup to detect the quantum component in the heat flow exchanged by a coherently driven atom with its thermal environment.
tuning the driving parameters switches on and off the quantum and classical contributions to the heat flows, enabling their independent characterization.
arXiv Detail & Related papers (2020-01-28T14:38:32Z)
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.