Thermodynamics and State Preparation in a Two-State System of Light

• URL: http://arxiv.org/abs/2411.14838v1
• Date: Fri, 22 Nov 2024 10:22:03 GMT
• Title: Thermodynamics and State Preparation in a Two-State System of Light
• Authors: Christian Kurtscheid, Andreas Redmann, Frank Vewinger, Julian Schmitt, Martin Weitz,
• Abstract summary: Coupling two-level quantum systems to the thermal environment is a fundamental problem, with applications ranging from qubit state preparation to spin models. We thermalize photons in a two-mode system with tunable chemical potential, demonstrating N bosons populating a two-level system coupled to a heat bath. Our experiment holds promise for state preparation in quantum technologies as well as for quantum thermodynamics studies.
• Score: 0.0
• License:
• Abstract: The coupling of two-level quantum systems to the thermal environment is a fundamental problem, with applications ranging from qubit state preparation to spin models. However, for the elementary problem of the thermodynamics of an ensemble of bosons populating a two-level system despite its conceptual simplicity experimental realizations are scarce. Using an optical dye microcavity platform, we thermalize photons in a two-mode system with tunable chemical potential, demonstrating N bosons populating a two-level system coupled to a heat bath. Under pulsed excitation, Josephson oscillations between the two quantum states demonstrate the possibility for coherent manipulation. In contrast, under stationary conditions the thermalization of the two-mode system is observed. As the energetic splitting between eigenstates is two orders of magnitude smaller than thermal energy, at low occupations an almost equal distribution of the modes occupation is observed, as expected from Boltzmann statistics. For larger occupation, we observe efficient population of the ground state and saturation of the upper level at high filling, expected from quantum statistics. Our experiment holds promise for state preparation in quantum technologies as well as for quantum thermodynamics studies.

Related papers

• 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)
• 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)
• Thermodynamic Phase Diagram of Two-Dimensional Bosons in a Quasicrystal Potential [0.0]
  We determine the thermodynamic phase diagram of interacting bosons in a two-dimensional, homogeneous quasicrystal potential. Our results are found using quantum Monte Carlo simulations. In particular, we demonstrate stabilization of a genuine Bose glass phase against the normal fluid in sizable parameter ranges.
  arXiv  Detail & Related papers  (2022-10-27T15:09:36Z)
• Heat transport in an optical lattice via Markovian feedback control [0.0]
  We use Markovian feedback control to synthesize two effective thermal baths that couple to the boundaries of a one-dimensional Bose-Hubbard chain. We investigate the steady-state heat current, including its scaling with system size and its response to disorder. We provide a route for the quantum simulation of heat-current-carrying steady states of matter in atomic quantum gases.
  arXiv  Detail & Related papers  (2022-07-27T16:35:24Z)
• 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)
• Floquet-heating-induced Bose condensation in a scar-like mode of an open driven optical-lattice system [62.997667081978825]
  We show that the interplay of bath-induced dissipation and controlled Floquet heating can give rise to non-equilibrium Bose condensation. Our predictions are based on a microscopic model that is solved using kinetic equations of motion derived from Floquet-Born-Markov theory.
  arXiv  Detail & Related papers  (2022-04-14T17:56:03Z)
• Non-equilibrium quantum thermodynamics of a particle trapped in a controllable time-varying potential [0.0]
  We study the dynamics of a levitated nanoparticles undergoing the transition from an harmonic potential to a double-well. We investigate the dynamics with the Wehrl entropy production and its rates. The effects and the competitions of the unitary and the dissipative parts onto the system are demonstrated.
  arXiv  Detail & Related papers  (2021-10-29T16:25:25Z)
• 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)
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
  We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
  arXiv  Detail & Related papers  (2021-02-01T18:09:01Z)
• Ergotropy from coherences in an open quantum system [0.0]
  We show that it is possible to have non-zero ergotropy in the steady-states of an open quantum system consisting of qubits. Our results suggest that one can design a quantum battery that is charged by a dissipative thermal bath in the weak coupling regime.
  arXiv  Detail & Related papers  (2020-05-18T07:03:39Z)
• Prethermalization of quantum systems interacting with non-equilibrium environments [0.0]
  We study a two level system coupled to a first thermal reservoir that in turn couples to a second thermal bath at a different temperature. We observe prethermalization, a transitory phenomenon in which the system initially approaches thermal equilibrium with respect to the first reservoir. In this case, the energy current through the system may exhibit transient features and even switch direction, before the system eventually reaches a non-equilibrium steady state.
  arXiv  Detail & Related papers  (2020-05-15T09:46:51Z)

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.