Quantumness of gravitational cat states in correlated dephasing channels
arXiv:2404.13294 · doi:10.1140/epjc/s10052-024-13034-8
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.
arXiv comment14 pages, 10 figures
References in corpus (21)
- Quantifying Coherence
- Bell nonlocality
- Quantum Coherence as a Resource
- A Spin Entanglement Witness for Quantum Gravity
- Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
- Quantum Fisher information matrix and multiparameter estimation
- Minimal Length Scale Scenarios for Quantum Gravity
- Testing Einstein's special relativity with Fermi's short hard gamma-ray burst GRB090510
- Testing the limits of quantum mechanical superpositions
- Quantum channels and memory effects
- A Scheme to Probe the Decoherence of a Macroscopic Object
- Entanglement enhanced information transmission over a quantum channel with correlated noise
- Universal decoherence due to gravitational time dilation
- Quantum discord determines the interferometric power of quantum states
- Completely positive maps with memory
- Probing a Gravitational Cat State
- Relations between entanglement, Bell-inequality violation and teleportation fidelity for the two-qubit X states
- Local quantum Fisher information and local quantum uncertainty for general X-states
- Quantumness near a Schwarzschild black hole
- Thermal quantum correlations in two gravitational cat states
- Quantum dense coding with gravitational cat states