System-environment dynamics of GHZ-like states in noninertial frames

TL;DR

This paper investigates how GHZ-like quantum states evolve under decoherence and relativistic effects in non-inertial frames, revealing differences in robustness among quantum coherence, entanglement, and nonlocality.

Contribution

It provides a detailed analysis of the dynamical behavior of three-qubit GHZ-like states in non-inertial frames under amplitude damping, highlighting the differential impact of decoherence and the Unruh effect.

Findings

Quantum coherence is most resistant to decoherence and Unruh effect.

Quantum entanglement and nonlocality are more fragile, with potential sudden death.

The Unruh effect and decoherence influence the state evolution differently.

Abstract

Quantum coherence, quantum entanglement and quantum nonlocality are important resources in quantum information precessing. However, decoherence happens when a quantum system interacts with the external environments. We study the dynamical evolution of the three-qubit GHZ-like states in non-inertial frame when one and/or two qubits undergo decoherence. Under the amplitude damping channel we show that the quantum decoherence and the Unruh effect may have quite different influences on the initial state. Moreover, the genuine tripartite entanglement and the quantum coherence may suffer sudden death during the evolution. The quantum coherence is most resistent to the quantum decoherence and the Unruh effect, then comes the quantum entanglement and the quantum nonlocality which is most fragile among the three. The results provide a new research perspective for relativistic quantum informatics.