A novel scheme for modelling dissipation or thermalization in open quantum systems

• URL: http://arxiv.org/abs/2404.10286v2
• Date: Fri, 15 Nov 2024 15:52:40 GMT
• Title: A novel scheme for modelling dissipation or thermalization in open quantum systems
• Authors: Fardin Kheirandish, Elmira Bolandhemmat, Narges Cheraghpour, Ronak Moradi, Servieh Ahmadian,
• Abstract summary: We introduce a novel method for investigating dissipation (gain) and thermalization in an open quantum system. To demonstrate the efficiency and significance of the method, we apply it to some ubiquitous open quantum systems.
• Score: 0.0
• License:
• Abstract: In this letter, we introduce a novel method for investigating dissipation (gain) and thermalization in an open quantum system. In this method, the quantum system is coupled linearly with a copy of itself or with another system described by a finite number of bosonic operators. The time-dependent coupling functions play a fundamental role in this scheme. To demonstrate the efficiency and significance of the method, we apply it to some ubiquitous open quantum systems. Firstly, we investigate a quantum oscillator in the presence of a thermal bath at the inverse temperature $\beta$, obtaining the reduced density matrix, the Husimi distribution function, and the quantum heat distribution function accurately. The results are consistent with existing literature by appropriate choices for the time-dependent coupling function. To illustrate the generalizability of this method to systems interacting with multiple thermal baths, we study the interaction of a quantum oscillator with two thermal baths at different temperatures and obtain compatible results. Subsequently, we analyze a two-level atom with energy or phase dissipation and derive the spontaneous emission and the pure dephasing processes consistently using the new method. Finally, we investigate the Markovianity in a dissipative two-level system.

Related papers

• Slow Relaxation in a Glassy Quantum Circuit [0.0]
  We introduce and analyze a Floquet random quantum circuit that can be tuned between glassy and fully ergodic behavior. Using an effective field theory for random quantum circuits, we analyze the correlations between quasienergy eigenstates. We show that the ramp of the spectral form factor is enhanced by a factor of the number of sectors in the glassy regime.
  arXiv  Detail & Related papers  (2024-10-30T17:58:08Z)
• Squeezed Thermal Reservoir Engineering via Linear Interactions [0.16574413179773761]
  We present a versatile method for creating a squeezed thermal reservoir for quantum systems. By coupling the system to a lossy mode within a normal thermal environment, we can emulate the effect of a squeezed reservoir.
  arXiv  Detail & Related papers  (2024-08-28T18:00:01Z)
• Heat as a witness of quantum properties [0.0]
  We present a new approach for witnessing quantum resources, including entanglement and coherence, based on heat generation. Inspired by the concept of Maxwell's demon, we analyze the heat exchange between a quantum system and a thermal environment. We find that quantum states can reveal their non-classical signatures via energy exchange with a thermal environment.
  arXiv  Detail & Related papers  (2024-08-12T18:00:05Z)
• Asymmetries of thermal processes in open quantum systems [0.0]
  An intriguing phenomenon in non-equilibrium quantum thermodynamics is the asymmetry of thermal processes. We show that the free relaxation to thermal equilibrium follows intrinsically different paths depending on whether the temperature of the system increases (heating up) or decreases (cooling down) Our theory is exemplified using the recently developed thermal kinematics based on information geometry theory.
  arXiv  Detail & Related papers  (2024-06-28T11:07:21Z)
• Quasiprobabilities in quantum thermodynamics and many-body systems: A tutorial [0.0]
  We present the definition, interpretation and properties of the main quasiprobabilities known in the literature. We illustrate the use of quasiprobabilities in quantum thermodynamics to describe the quantum statistics of work and heat.
  arXiv  Detail & Related papers  (2024-03-25T19:22:57Z)
• Quantum Fisher Information for Different States and Processes in Quantum Chaotic Systems [77.34726150561087]
  We compute the quantum Fisher information (QFI) for both an energy eigenstate and a thermal density matrix. We compare our results with earlier results for a local unitary transformation.
  arXiv  Detail & Related papers  (2023-04-04T09:28:19Z)
• 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)
• From geometry to coherent dissipative dynamics in quantum mechanics [68.8204255655161]
  We work out the case of finite-level systems, for which it is shown by means of the corresponding contact master equation. We describe quantum decays in a 2-level system as coherent and continuous processes.
  arXiv  Detail & Related papers  (2021-07-29T18:27:38Z)
• 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)

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.