Abstract In this work, we propose a measure for the quantum discord of indistinguishable particles, based on the definition of entanglement of particles given in Wiseman and Vaccaro (Phys Rev Lett 91:097902, 2003. doi:10.1103/PhysRevLett.91. 097902). This discord of particles is then used to evaluate the quantum correlations in a system of two identical bosons (fermions), where the particles perform a quantum random walk described by the Hubbard Hamiltonian in a 1D lattice. The dynamics of the particles is either unperturbed or subject to a classical environmental noise—such as random telegraph, pink or brown noise. The observed results are consistent with those for the entanglement of particles, and we observe that on-site interaction between particles have an important protective effect on correlations against the decoherence of the system.

Quantum correlations of identical particles subject to classical environmental noise / Beggi, Andrea; Buscemi, Fabrizio; Bordone, Paolo. - In: QUANTUM INFORMATION PROCESSING. - ISSN 1570-0755. - STAMPA. - 15:9(2016), pp. 3711-3743. [10.1007/s11128-016-1334-8]

Quantum correlations of identical particles subject to classical environmental noise

BEGGI, ANDREA;BUSCEMI, Fabrizio;BORDONE, Paolo
2016-01-01

Abstract

Abstract In this work, we propose a measure for the quantum discord of indistinguishable particles, based on the definition of entanglement of particles given in Wiseman and Vaccaro (Phys Rev Lett 91:097902, 2003. doi:10.1103/PhysRevLett.91. 097902). This discord of particles is then used to evaluate the quantum correlations in a system of two identical bosons (fermions), where the particles perform a quantum random walk described by the Hubbard Hamiltonian in a 1D lattice. The dynamics of the particles is either unperturbed or subject to a classical environmental noise—such as random telegraph, pink or brown noise. The observed results are consistent with those for the entanglement of particles, and we observe that on-site interaction between particles have an important protective effect on correlations against the decoherence of the system.
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Quantum correlations of identical particles subject to classical environmental noise / Beggi, Andrea; Buscemi, Fabrizio; Bordone, Paolo. - In: QUANTUM INFORMATION PROCESSING. - ISSN 1570-0755. - STAMPA. - 15:9(2016), pp. 3711-3743. [10.1007/s11128-016-1334-8]
Beggi, Andrea; Buscemi, Fabrizio; Bordone, Paolo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1113191
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