Exploring the hierarchy of quantum correlations under thermal effects in two gravitational cat states

• URL: http://arxiv.org/abs/2404.19648v1
• Date: Tue, 30 Apr 2024 15:47:29 GMT
• Title: Exploring the hierarchy of quantum correlations under thermal effects in two gravitational cat states
• Authors: Elhabib Jaloum, Mohamed Amazioug,
• Abstract summary: 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In this article, we investigate the hierarchy of quantum correlations between two gravitational cats states (modeled by two qubits). We use concurrence to quantify the entanglement between the two gravitational cat states. Quantum steering is employed to measure the steerabilities. We consider geometric quantum discord to quantify quantum correlations beyond entanglement. We show that the concurrence persists even when steerability is lost under thermal effects. We also show that the temperature influences the degree of quantum correlations between the two gravitational cat states. Besides, when the energy difference between the ground state and the first excited level becomes significant, the states become separable.

Related papers

• 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)
• Quantumness of gravitational cat states in correlated dephasing channels [0.0]
  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.
  arXiv  Detail & Related papers  (2024-04-20T06:52:11Z)
• Coupled vertical double quantum dots at single-hole occupancy [37.69303106863453]
  We control vertical double quantum dots confined in a double quantum well, silicon-germanium heterostructure. We sense individual charge transitions with a single-hole transistor. tuning the vertical double quantum dot to the (1,1) charge state confines a single hole in each quantum well beneath a single plunger gate.
  arXiv  Detail & Related papers  (2024-01-15T14:46:40Z)
• Quantum Thermodynamics and Hierarchy of Quantum Correlations and Fidelity of Teleportation in a Two Coupled Double Quantum Dots [0.0]
  We find the hierarchy of quantum correlations, and one-way steering between the two quantum dots. We show that this state can be used for quantum teleportation.
  arXiv  Detail & Related papers  (2023-10-25T06:27:02Z)
• 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)
• Observation of partial and infinite-temperature thermalization induced by repeated measurements on a quantum hardware [62.997667081978825]
  We observe partial and infinite-temperature thermalization on a quantum superconducting processor. We show that the convergence does not tend to a completely mixed (infinite-temperature) state, but to a block-diagonal state in the observable basis.
  arXiv  Detail & Related papers  (2022-11-14T15:18:11Z)
• 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)
• Quantum Superposition of Two Gravitational Cat States [0.0]
  We extend our earlier work on probing a gravitational cat state (gravcat) in an exemplary model and in Bose-Einstein condensates (BEC) Using a mathematical analogy to quantum rotors, we explore the properties of the two-gravcat system for BECs, its physical consequences and observational possibilities.
  arXiv  Detail & Related papers  (2020-07-13T15:32:45Z)
• 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.