Exceptional point induced quantum phase synchronization and entanglement dynamics in mechanically coupled gain-loss oscillators

• URL: http://arxiv.org/abs/2309.06508v1
• Date: Tue, 12 Sep 2023 18:30:51 GMT
• Title: Exceptional point induced quantum phase synchronization and entanglement dynamics in mechanically coupled gain-loss oscillators
• Authors: Joy Ghosh, Souvik Mondal, Shailendra K. Varshney, kapil Debnath
• Abstract summary: This paper investigates how quantum phase synchronization relates to bipartite Gaussian entanglement in coupled gain-loss mechanical oscillators. We examine the role of exceptional point in a deterministic way of producing self-sustained oscillations that induce robust quantum correlations. These findings hold promise for applications in phonon-based quantum communication and information processing.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The optomechanical cavity (OMC) system has been a paradigm in the manifestation of continuous variable quantum information over the past decade. This paper investigates how quantum phase synchronization relates to bipartite Gaussian entanglement in coupled gain-loss mechanical oscillators, where the gain and loss rates are engineered by driving the cavity with blue and red detuned lasers, respectively. We examine the role of exceptional point in a deterministic way of producing self-sustained oscillations that induce robust quantum correlations among quadrature fluctuations of the oscillators. Particularly, steady phase synchronization dynamics along with the entanglement phenomena are observed in the effective weak coupling regime above a critical driving power. These phenomena are further verified by observing the mechanical squeezing and phase space rotations of the Wigner distributions. Additionally, we discuss how the oscillators frequency mismatches and decoherence due to thermal phonons impact the system dynamics. These findings hold promise for applications in phonon-based quantum communication and information processing.

Related papers

• Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
  We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide. When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits. We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
  arXiv  Detail & Related papers  (2024-08-30T15:54:33Z)
• Transient dynamical phase diagram of the spin-boson model [0.0]
  We investigate the real-time dynamics of the sub-Ohmic spin-boson model across a broad range of coupling strengths. We extract signatures of the zero-temperature quantum phase transition between localized and delocalized states. We identify and quantitatively analyze two competing mechanisms for the crossover between coherent oscillations and incoherent decay.
  arXiv  Detail & Related papers  (2024-02-28T18:52:23Z)
• 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)
• Quantum synchronization of qubits via dynamical Casimir effect [1.6574413179773757]
  We study the synchronization of qubits induced by the dynamical Casimir effect in an atom-cavity quantum electrodynamics system. We unveil a remarkable feature that is unique to synchronization induced by the dynamical Casimir effect.
  arXiv  Detail & Related papers  (2023-08-30T06:45:22Z)
• 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)
• Metastable quantum entrainment [0.0]
  We show that quantum entrainment is here characterized by fluctuations driving an incoherent process between two metastable phases. We discuss connections with the phenomena of dissipative phase transitions and transient synchronization in open quantum systems.
  arXiv  Detail & Related papers  (2021-09-03T10:58:21Z)
• Quantum Zeno effect in self-sustaining systems: suppressing phase diffusion via repeated measurements [0.0]
  We study the effect of frequent projective measurements on the dynamics of quantum self-sustaining systems. We show that by subjecting the system to repeated measurements of heterodyne type at an appropriate repetition frequency one can significantly suppress phase diffusion without spoiling the semiclassical dynamics.
  arXiv  Detail & Related papers  (2021-07-13T12:56:06Z)
• Continuous-time dynamics and error scaling of noisy highly-entangling quantum circuits [58.720142291102135]
  We simulate a noisy quantum Fourier transform processor with up to 21 qubits. We take into account microscopic dissipative processes rather than relying on digital error models. We show that depending on the dissipative mechanisms at play, the choice of input state has a strong impact on the performance of the quantum algorithm.
  arXiv  Detail & Related papers  (2021-02-08T14:55:44Z)
• Waveguide quantum optomechanics: parity-time phase transitions in ultrastrong coupling regime [125.99533416395765]
  We show that the simplest set-up of two qubits, harmonically trapped over an optical waveguide, enables the ultrastrong coupling regime of the quantum optomechanical interaction. The combination of the inherent open nature of the system and the strong optomechanical coupling leads to emerging parity-time (PT) symmetry. The $mathcalPT$ phase transition drives long-living subradiant states, observable in the state-of-the-art waveguide QED setups.
  arXiv  Detail & Related papers  (2020-07-04T11:02:20Z)
• Synchronisation phase as an indicator of persistent quantum correlations between subsystems [68.8204255655161]
  Spontaneous synchronisation is a collective phenomenon that can occur in both dynamical classical and quantum systems. We show that our analysis applies to a variety of spontaneously synchronising open quantum systems.
  arXiv  Detail & Related papers  (2020-06-29T17:21:32Z)

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.