Non-local dynamics of Bell states in separate cavities

TL;DR

This paper investigates the non-local dynamics of Bell states in separate cavities, revealing how entanglement damping, fidelity, and entropy evolve under different conditions, with implications for quantum information processing.

Contribution

It provides new insights into how cavity leakage rates and initial states influence entanglement and fidelity dynamics in Bell states.

Findings

Entanglement damping saturates at leakage rate ≥ 0.4

Fidelity and concurrence synchronism depends on initial state

Entropy dynamics can oppose fidelity depending on initial state

Abstract

We present non-local dynamics of Bell states in separate cavities. It is demonstrated that (i) the entanglement damping speed will saturate when the cavity leakage rate $\gamma\geq 0.4$; (ii) the synchronism relationship between the fidelity and the concurrence depends on the initial state; (iii) if the initial state is $1/\sqrt{2}(|01>+|10>)$, the dynamics of entropy is opposite to that of fidelity.