Quantum Mpemba effect in a quantum dot with reservoirs

• URL: http://arxiv.org/abs/2304.02411v2
• Date: Fri, 14 Jul 2023 02:36:17 GMT
• Title: Quantum Mpemba effect in a quantum dot with reservoirs
• Authors: Amit Kumar Chatterjee, Satoshi Takada, Hisao Hayakawa
• Abstract summary: We show that the system temperatures starting from two different initial values, cross each other at finite time to generate thermal quantam Mpemba effect. The slowest relaxation mode believed to play the dominating role in Mpemba effect in Markovian systems, does not contribute to such anomalous relaxation in the present model.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We demonstrate the quantum Mpemba effect in a quantum dot coupled to two reservoirs, described by the Anderson model. We show that the system temperatures starting from two different initial values (hot and cold), cross each other at finite time (and thereby reverse their identities i.e. hot becomes cold and vice versa) to generate thermal quantam Mpemba effect. The slowest relaxation mode believed to play the dominating role in Mpemba effect in Markovian systems, does not contribute to such anomalous relaxation in the present model. In this connection, our analytical result provides necessary condition for producing quantum Mpemba effect in the density matrix elements of the quantum dot, as a combined effect of the remaining relaxation modes.

Related papers

• Mpemba effects in open nonequilibrium quantum systems [0.0]
  We show that two different types of quantum Mpemba effects are possible. The existence of a quantum Mpemba effect can already be established by measuring simpler observables.
  arXiv  Detail & Related papers  (2024-06-05T17:58:19Z)
• Observation of quantum strong Mpemba effect [0.568742895734281]
  We report the first experiment, as far as we know,about the strong Mpemba effect in a single trapped ion system. Our work provides an efficient strategy to exponentially accelerate relaxations of quantum system to their stationary state. It could open up the door to engineer a wide range of dissipative quantum systems.
  arXiv  Detail & Related papers  (2024-01-29T08:25:34Z)
• Amplification of quantum transfer and quantum ratchet [56.47577824219207]
  We study a model of amplification of quantum transfer and making it directed which we call the quantum ratchet model. The ratchet effect is achieved in the quantum control model with dissipation and sink, where the Hamiltonian depends on vibrations in the energy difference synchronized with transitions between energy levels. Amplitude and frequency of the oscillating vibron together with the dephasing rate are the parameters of the quantum ratchet which determine its efficiency.
  arXiv  Detail & Related papers  (2023-12-31T14:04:43Z)
• Multiple quantum Mpemba effect: exceptional points and oscillations [0.0]
  We study the role of exceptional points and complex eigenvalues on the occurrence of the quantum Mpemba effect. We find that both exceptional points and complex eigenvalues can lead to $multiple$ quantum Mpemba effect.
  arXiv  Detail & Related papers  (2023-11-02T15:57:11Z)
• Quantum Effects on the Synchronization Dynamics of the Kuramoto Model [62.997667081978825]
  We show that quantum fluctuations hinder the emergence of synchronization, albeit not entirely suppressing it. We derive an analytical expression for the critical coupling, highlighting its dependence on the model parameters.
  arXiv  Detail & Related papers  (2023-06-16T16:41:16Z)
• Quantum Otto engine with quantum correlations [3.740507726022551]
  We investigate a photo-Otto engine that is working with a single-mode radiation field inside an optical cavity and driven by a hot and a cold reservoir. We show that quantum discord boosts the performance and efficiency of the quantum engine, and even may change the operation mode.
  arXiv  Detail & Related papers  (2022-11-23T02:56:10Z)
• 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)
• Implementation of a two-stroke quantum heat engine with a collisional model [50.591267188664666]
  We put forth a quantum simulation of a stroboscopic two-stroke thermal engine in the IBMQ processor. The system consists of a quantum spin chain connected to two baths at their boundaries, prepared at different temperatures using the variational quantum thermalizer algorithm.
  arXiv  Detail & Related papers  (2022-03-25T16:55:08Z)
• Observation-dependent suppression and enhancement of two-photon coincidences by tailored losses [68.8204255655161]
  Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter. In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement. Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
  arXiv  Detail & Related papers  (2021-05-12T06:47:35Z)
• Nonequilibrium fluctuations of a quantum heat engine [0.0]
  We experimentally investigate the efficiency and nonequilibrium entropy production statistics of a spin-1/2 quantum Otto cycle. Our results characterize the statistical features of a small-scale thermal machine in the quantum domain.
  arXiv  Detail & Related papers  (2021-04-27T18:53:53Z)
• 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)

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.