Entanglement robustness via spatial deformation of identical particle wave functions

Rosario Lo Franco, Giuseppe Compagno, Matteo Piccolini, Farzam Nosrati, Patrizia Livreri, Farzam Nosrati, Matteo Piccolini, Roberto Morandotti

Research output: Contribution to journalArticlepeer-review

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.
Original languageEnglish
Number of pages12
JournalEntropy
Volume23
Publication statusPublished - 2021

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Mathematical Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering

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