Thermal quantum correlations and teleportation under PT-symmetric system

• URL: http://arxiv.org/abs/2203.05163v2
• Date: Sat, 18 Feb 2023 07:06:57 GMT
• Title: Thermal quantum correlations and teleportation under PT-symmetric system
• Authors: J. Ramya Parkavi, R. Muthuganesan, V. K. Chandrasekar, and M. Lakshmanan
• Abstract summary: We exploit the different notions of quantumness measure to understand the properties of the Heisenberg XY model with and without PT-symmetric operation. It is observed that the quantum correlations and teleportation fidelity monotonically decreases with respect to temperature. The intervention of PT-symmetric operation enhances the strengths of quantum correlation.
• Score: 1.1866362087993556
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In this article, we exploit the different notions of quantumness measure to understand the properties of the Heisenberg XY model with and without PT-symmetric operation. In the absence of PT-symmetry, we study the significance of different measures, namely entanglement and measurement induced nonlocality (MIN), in the detection of the quantumness of the Heisenberg XY model. It is observed that the quantum correlations and teleportation fidelity monotonically decreases with respect to temperature. Furthermore, the intervention of PT-symmetric operation enhances the strengths of quantum correlation. In addition, we highlight the role of the system's parameters and PT-symmetric operation on the teleportation of a quantum state. Our results also emphasize that after the addition of PT-symmetric operation, the considered physical model remains a versatile resource to achieve successful teleportation of the quantum state.

Related papers

• 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 metric and metrology with parametrically-driven Tavis-Cummings models [4.419622364505575]
  We study the quantum metric in a driven Tavis-Cummings model, comprised of multiple qubits interacting with a quantized photonic field. We analytically solved the eigenenergies and eigenstates, and numerically simulated the system behaviors near the critical point.
  arXiv  Detail & Related papers  (2023-12-13T14:20:03Z)
• Enhanced Entanglement in the Measurement-Altered Quantum Ising Chain [46.99825956909532]
  Local quantum measurements do not simply disentangle degrees of freedom, but may actually strengthen the entanglement in the system. This paper explores how a finite density of local measurement modifies a given state's entanglement structure.
  arXiv  Detail & Related papers  (2023-10-04T09:51:00Z)
• Universality of critical dynamics with finite entanglement [68.8204255655161]
  We study how low-energy dynamics of quantum systems near criticality are modified by finite entanglement. Our result establishes the precise role played by entanglement in time-dependent critical phenomena.
  arXiv  Detail & Related papers  (2023-01-23T19:23:54Z)
• Extension of Noether's theorem in PT-symmetric systems and its experimental demonstration in an optical setup [0.3957768262206625]
  We extend Noether's theorem to a class of significant PT -symmetric systems. We experimentally investigate the extended Noether's theorem in PT -symmetric single-qubit and two-qubit systems.
  arXiv  Detail & Related papers  (2023-01-18T05:32:06Z)
• PT-symmetric quantum Rabi model [2.8009256749748257]
  We explore the PT-symmetric quantum Rabi model, which describes a PT-symmetric qubit coupled to a quantized light field. Rich and exotic behaviors are observed in both strong and ultra-strong coupling regimes. Our work extends the theory of PT symmetry into the full quantum light-matter interaction regime and provides insights that can be readily enlarged to a broad class of quantum optical systems.
  arXiv  Detail & Related papers  (2022-12-13T14:00:51Z)
• Symmetric Pruning in Quantum Neural Networks [111.438286016951]
  Quantum neural networks (QNNs) exert the power of modern quantum machines. QNNs with handcraft symmetric ansatzes generally experience better trainability than those with asymmetric ansatzes. We propose the effective quantum neural tangent kernel (EQNTK) to quantify the convergence of QNNs towards the global optima.
  arXiv  Detail & Related papers  (2022-08-30T08:17:55Z)
• PT symmetry and the evolution speed in open quantum systems [0.0]
  The dynamics of an open quantum system with balanced gain and loss is not described by a PT-symmetric Hamiltonian but rather by Lindblad operators. Here we briefly review the development of PT symmetry in quantum mechanics, and the characterisation of PT-symmetry breaking in open quantum systems.
  arXiv  Detail & Related papers  (2021-05-20T16:01:02Z)
• Quantum Non-equilibrium Many-Body Spin-Photon Systems [91.3755431537592]
  dissertation concerns the quantum dynamics of strongly-correlated quantum systems in out-of-equilibrium states. Our main results can be summarized in three parts: Signature of Critical Dynamics, Driven Dicke Model as a Test-bed of Ultra-Strong Coupling, and Beyond the Kibble-Zurek Mechanism.
  arXiv  Detail & Related papers  (2020-07-23T19:05:56Z)
• Emergence of PT-symmetry breaking in open quantum systems [0.0]
  We generalize the definition of PT symmetry to finite-dimensional open quantum systems. We identify and accurately describe PT-symmetry breaking effects in a large variety of physical systems.
  arXiv  Detail & Related papers  (2020-03-04T19:00:00Z)
• Quantum Statistical Complexity Measure as a Signalling of Correlation Transitions [55.41644538483948]
  We introduce a quantum version for the statistical complexity measure, in the context of quantum information theory, and use it as a signalling function of quantum order-disorder transitions. We apply our measure to two exactly solvable Hamiltonian models, namely: the $1D$-Quantum Ising Model and the Heisenberg XXZ spin-$1/2$ chain. We also compute this measure for one-qubit and two-qubit reduced states for the considered models, and analyse its behaviour across its quantum phase transitions for finite system sizes as well as in the thermodynamic limit by using Bethe ansatz.
  arXiv  Detail & Related papers  (2020-02-05T00:45:21Z)

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.