Indistinguishability-enhanced entanglement recovery by spatially localized operations and classical communication

TL;DR

This paper demonstrates that spatial indistinguishability can be exploited via sLOCC operations to recover entanglement in qubits affected by various types of noise, enhancing quantum network robustness.

Contribution

It introduces a practical method using sLOCC to restore entanglement in noisy environments by leveraging spatial indistinguishability of particles.

Findings

Entanglement recovery is proportional to spatial indistinguishability.

The method works under phase damping, depolarizing, and amplitude damping noise.

sLOCC provides a feasible framework for quantum state protection.

Abstract

We extend a procedure exploiting spatial indistinguishability of identical particles to recover the spoiled entanglement between two qubits interacting with Markovian noisy environments. Here, the spatially localized operations and classical communication (sLOCC) operational framework is used to activate the entanglement restoration from the indistinguishable constituents. We consider the realistic scenario where noise acts for the whole duration of the process. Three standard types of noises are considered: a phase damping, a depolarizing, and an amplitude damping channel. Within this general scenario, we find the entanglement to be restored in an amount proportional to the degree of spatial indistinguishability. These results elevate sLOCC to a practical framework for accessing and utilizing quantum state protection within a quantum network of spatially indistinguishable subsystems.