Entanglement robustness via spatial deformation of identical particle wave functions

Abstract

We address the problem of entanglement protection against surrounding noise by a procedure suitably exploiting spatial indistinguishability of identical subsystems. To this purpose, we take two initially separated and entangled identical qubits interacting with two independent noisy environments. Three typical models of environments are considered: amplitude damping channel, phase damping channel and depolarizing channel. After the interaction, we deform the wave functions of the two qubits to make them spatially overlap before performing spatially localized operations and classical communication (sLOCC) and eventually computing the entanglement of the resulting state. This way, we show that spatial indistinguishability of identical qubits can be utilized within the sLOCC operational framework to partially recover the quantum correlations spoiled by the environment. A general behavior emerges: the higher the spatial indistinguishability achieved via deformation, the larger the amount of recovered entanglement.

13 pages, 10 figures

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Cited by in corpus (10)

• Experimental quantum phase discrimination enhanced by controllable indistinguishability-based coherence
• Remote entanglement distribution in a quantum network via multinode indistinguishability of photons
• Indistinguishability-enhanced entanglement recovery by spatially localized operations and classical communication
• Robust engineering of maximally entangled states by identical particle interferometry
• Quantumness and speedup limit of a qubit under transition frequency modulation
• Generation of genuine multipartite entangled states via indistinguishability of identical particles
• Direct measurement of particle statistical phase
• Generating indistinguishability within identical particle systems: spatial deformations as quantum resource activators
• Indistinguishability-assisted two-qubit entanglement distillation
• Suppressing decoherence in quantum state transfer with unitary operations