Tunable quantum Mpemba effect in long-range interacting systems

• URL: http://arxiv.org/abs/2510.12875v1
• Date: Tue, 14 Oct 2025 18:00:02 GMT
• Title: Tunable quantum Mpemba effect in long-range interacting systems
• Authors: Andrew Hallam, Matthew Yusuf, Aashish A. Clerk, Ivar Martin, Zlatko Papić,
• Abstract summary: We study the quantum Mpemba effect (QME) in a one-dimensional spin-1/2 XYZ model with power-law decaying interactions in the presence of a magnetic field.<n>Due to the Hohenberg-Mermin-Wagner theorem, the QME can only arise when interactions are sufficiently short-ranged.<n>We systematically explore this interplay and analyze the dependence of the QME on the effective temperature set by the initial state.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Symmetry plays a fundamental role in many-body systems, both in and out of equilibrium. The quantum Mpemba effect (QME) - a phenomenon where systems initially farther from equilibrium can thermalize faster - can be understood in terms of how rapidly a symmetry, broken by initial conditions, is dynamically restored. In this work, we study the QME in a one-dimensional spin-1/2 XYZ model with power-law decaying interactions in the presence of a magnetic field. In the prethermal regime generated by large field strengths, the system develops a continuous U(1) symmetry, enabling the QME to emerge. However, due to the Hohenberg-Mermin-Wagner theorem, the QME can only arise when interactions are sufficiently short-ranged. This leads to an interplay between the external field, interaction range, and dynamical symmetry restoration. We systematically explore this interplay and analyze the dependence of the QME on the effective temperature set by the initial state. Our results demonstrate the tunability of the QME via long-range interactions, which can be probed in experimental platforms of trapped ions, polar molecules, and NV centers.

Related papers

• Quantum Mpemba effect in a four-site Bose-Hubbard model [0.8619139771027764]
  We investigate the quantum Mpemba effect (QME) in a one-dimensional Bose-Hubbard model across clean and disordered regimes.<n>Our results reveal that QME emerges prominently in the clean-interacting regime, where many-body correlations drive nonlinear relaxation pathways.
  arXiv  Detail & Related papers  (2025-09-08T17:48:42Z)
• Quantum Pontus-Mpemba Effects in Real and Imaginary-time Dynamics [5.626168552306134]
  The quantum Pontus-Mpemba effect (QPME) is a counterintuitive phenomenon wherein a quantum system relaxes more rapidly through a two-step evolution protocol.<n>We demonstrate that QPME occurs under both real-time and imaginary-time dynamics with respect to $U(1)$-symmetry.
  arXiv  Detail & Related papers  (2025-09-02T05:06:08Z)
• Observation and Modulation of the Quantum Mpemba Effect on a Superconducting Quantum Processor [22.152087534616076]
  In non-equilibrium quantum many-body systems, the quantum Mpemba effect (QME) emerges as a counterintuitive phenomenon.<n>We report the observation and control of QME using a superconducting processor featuring a unique fully connected, tunable-coupling architecture.<n>Our study provides the first demonstration of flexible QME modulation on a superconducting platform with multiple controllable parameters.
  arXiv  Detail & Related papers  (2025-08-11T07:35:26Z)
• Quantum Mpemba effect without global symmetries [0.8396839392630856]
  Mpemba effect, where a system initially farther from equilibrium relaxes faster than one closer to equilibrium, has been extensively studied in classical systems.<n>We argue that the QME is ubiquitous in generic, non-integrable many-body systems lacking such symmetries.<n>Using paradigmatic models such as the quantum Ising model with transverse and longitudinal fields, we show that the QME can be understood through the energy density of initial states.
  arXiv  Detail & Related papers  (2025-05-22T18:00:01Z)
• Prethermalization of light and matter in cavity-coupled Rydberg arrays [44.99833362998488]
  We explore the dynamics of two-dimensional Rydberg atom arrays coupled to a single-mode optical cavity.<n>We discover a novel prethermalization regime driven by the interplay between short-range Rydberg interactions and long-range photon-mediated interactions.
  arXiv  Detail & Related papers  (2025-04-08T17:59:59Z)
• Scalable spin squeezing from critical slowing down in short-range interacting systems [0.0]
  We show that scalable squeezing can be produced in 2d U(1)-symmetric systems even by short-range interactions. Our results open the path to realizing massive entangled states of potential metrological interest in many relevant platforms of quantum simulation and information processing.
  arXiv  Detail & Related papers  (2024-04-18T21:29:43Z)
• Slow semiclassical dynamics of a two-dimensional Hubbard model in disorder-free potentials [77.34726150561087]
  We show that introduction of harmonic and spin-dependent linear potentials sufficiently validates fTWA for longer times. In particular, we focus on a finite two-dimensional system and show that at intermediate linear potential strength, the addition of a harmonic potential and spin dependence of the tilt, results in subdiffusive dynamics.
  arXiv  Detail & Related papers  (2022-10-03T16:51:25Z)
• Correlations and energy in mediated dynamics [50.220421906597416]
  We study the time required to maximally entangle two principal systems interacting under the same energy constraints. Direct interactions are proved to provide the fastest way to entangle the principal systems, but it turns out that there exist mediated dynamics that are just as fast. The final message is that correlations save energy: one has to supply extra energy if maximal entanglement across the principal systems is to be obtained as fast as with an initially correlated mediator.
  arXiv  Detail & Related papers  (2022-08-30T14:49:08Z)
• Indication of critical scaling in time during the relaxation of an open quantum system [34.82692226532414]
  Phase transitions correspond to the singular behavior of physical systems in response to continuous control parameters like temperature or external fields. Near continuous phase transitions, associated with the divergence of a correlation length, universal power-law scaling behavior with critical exponents independent of microscopic system details is found.
  arXiv  Detail & Related papers  (2022-08-10T05:59:14Z)
• Emergent pair localization in a many-body quantum spin system [0.0]
  Generically, non-integrable quantum systems are expected to thermalize as they comply with the Eigenstate Thermalization Hypothesis. In the presence of strong disorder, the dynamics can possibly slow down to a degree that systems fail to thermalize on experimentally accessible timescales. We study an ensemble of Heisenberg spins with a tunable distribution of random coupling strengths realized by a Rydberg quantum simulator.
  arXiv  Detail & Related papers  (2022-07-28T16:31:18Z)
• 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)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)
• 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)

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.