Quantumness of gravitational cat states in correlated dephasing channels

• URL: http://arxiv.org/abs/2404.13294v2
• Date: Sat, 6 Jul 2024 17:02:17 GMT
• Title: Quantumness of gravitational cat states in correlated dephasing channels
• Authors: Saeed Haddadi, Mehrdad Ghominejad, Artur Czerwinski,
• Abstract summary: We study the quantumness of gravitational cat states in correlated dephasing channels. New features are reported that can be significant for both gravitational physics and quantum information processing.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We study the quantumness of gravitational cat states in correlated dephasing channels. Our focus is on exploring how classical correlations between successive actions of a dephasing channel influence the decoherence of two gravitational cats (two qubits) at a thermal regime. The results show that the quantum coherence, local quantum Fisher information, and Bell non-locality can be significantly enhanced by augmenting classical correlations throughout the entire duration when the two qubits pass the channel. However, the gravitational interaction and energy gap between states exhibit intricate impacts on the quantum characteristics of gravitational cats. New features are reported that can be significant for both gravitational physics and quantum information processing.

Related papers

• Precision bounds for multiple currents in open quantum systems [37.69303106863453]
  We derivation quantum TURs and KURs for multiple observables in open quantum systems undergoing Markovian dynamics. Our bounds are tighter than previously derived quantum TURs and KURs for single observables. We also find an intriguing quantum signature of correlations captured by the off-diagonal element of the Fisher information matrix.
  arXiv  Detail & Related papers  (2024-11-13T23:38:24Z)
• Expressibility, entangling power and quantum average causal effect for causally indefinite circuits [37.69303106863453]
  We implement parameterized quantum circuits with definite and indefinite causal order. One of these is the expressibility, which measures how uniformly a given quantum circuit can reach the whole Hilbert space. We find a correlation between the quantum average causal effect and the entangling power.
  arXiv  Detail & Related papers  (2024-11-13T13:53:02Z)
• Quantum Sensing from Gravity as Universal Dephasing Channel for Qubits [41.96816488439435]
  WeExploit the generic phenomena of the gravitational redshift and Aharonov-Bohm phase. We show that entangled quantum states dephase with a universal rate. We propose qubit-based platforms as quantum sensors for precision gravitometers and mechanical strain gauges.
  arXiv  Detail & Related papers  (2024-06-05T13:36:06Z)
• Relativistic Dips in Entangling Power of Gravity [0.0]
  We show that quantum correlations can remain strongly suppressed for certain choices of parameters. We find a pronounced cancellation point far from the Planck scale, where the system tends towards classicalization.
  arXiv  Detail & Related papers  (2024-05-07T20:44:30Z)
• Exploring the hierarchy of quantum correlations under thermal effects in two gravitational cat states [0.0]
  We use concurrence to quantify the entanglement between the two gravitational cat states. We consider geometric quantum discord to quantify quantum correlations beyond entanglement. We also show that the temperature influences the degree of quantum correlations between the two gravitational cat states.
  arXiv  Detail & Related papers  (2024-04-30T15:47:29Z)
• Advantage of gravitational cat states in preserving non-classical characteristics [0.8363593384698137]
  We investigate how resourceful gravitational cat states are to preserve quantum correlations. In particular, the one-way steerability, Bell non-locality, entanglement, and purity in two qubits are our main focus.
  arXiv  Detail & Related papers  (2023-08-24T03:47:06Z)
• Observing super-quantum correlations across the exceptional point in a single, two-level trapped ion [48.7576911714538]
  In two-level quantum systems - qubits - unitary dynamics theoretically limit these quantum correlations to $2qrt2$ or 1.5 respectively. Here, using a dissipative, trapped $40$Ca$+$ ion governed by a two-level, non-Hermitian Hamiltonian, we observe correlation values up to 1.703(4) for the Leggett-Garg parameter $K_3$. These excesses occur across the exceptional point of the parity-time symmetric Hamiltonian responsible for the qubit's non-unitary, coherent dynamics.
  arXiv  Detail & Related papers  (2023-04-24T19:44:41Z)
• Noise effects on purity and quantum entanglement in terms of physical implementability [27.426057220671336]
  Quantum decoherence due to imperfect manipulation of quantum devices is a key issue in the noisy intermediate-scale quantum (NISQ) era. Standard analyses in quantum information and quantum computation use error rates to parameterize quantum noise channels. We propose to characterize the decoherence effect of a noise channel by the physical implementability of its inverse.
  arXiv  Detail & Related papers  (2022-07-04T13:35:17Z)
• Thermal quantum correlations in two gravitational cat states [0.0]
  We consider the effect of a thermal bath on quantum correlations induced by the gravitational interaction in the weak field limit between two massive cat states. In particular, we observe that thermal fluctuations raise non-entangled quantum correlations when entanglement suddenly drops.
  arXiv  Detail & Related papers  (2021-06-10T12:33:03Z)
• Hierarchy of quantum correlations under non-Markovian dynamics [0.0]
  We investigate the dynamics of quantum correlations (QC) under the effects of reservoir memory. QC is a resource for quantum information and computation tasks.
  arXiv  Detail & Related papers  (2020-04-21T22:19:44Z)
• Jumptime unraveling of Markovian open quantum systems [68.8204255655161]
  We introduce jumptime unraveling as a distinct description of open quantum systems. quantum jump trajectories emerge, physically, from continuous quantum measurements. We demonstrate that quantum trajectories can also be ensemble-averaged at specific jump counts.
  arXiv  Detail & Related papers  (2020-01-24T09:35:32Z)

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.