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.

Piccolini M., Nosrati F., Compagno G., Livreri P., Morandotti R., & Lo Franco R. (2021). Entanglement robustness via spatial deformation of identical particle wave functions. ENTROPY, 23(6) [10.3390/e23060708].

Entanglement robustness via spatial deformation of identical particle wave functions

Piccolini M.
Investigation
;
Nosrati F.
Investigation
;
Compagno G.
Membro del Collaboration Group
;
Livreri P.
Membro del Collaboration Group
;
Morandotti R.
Membro del Collaboration Group
;
Lo Franco R.
Supervision
2021

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.
Settore ING-INF/01 - Elettronica
Settore FIS/03 - Fisica Della Materia
https://www.mdpi.com/1099-4300/23/6/708
Piccolini M., Nosrati F., Compagno G., Livreri P., Morandotti R., & Lo Franco R. (2021). Entanglement robustness via spatial deformation of identical particle wave functions. ENTROPY, 23(6) [10.3390/e23060708].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/515222
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