Quantum correlations of identical particles subject to classical environmental noise
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 [H. M. Wiseman et al., Phis. Rev. Lett 91, 097902 (2003)]. 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.
Keywords
Cite
@article{arxiv.1512.01989,
title = {Quantum correlations of identical particles subject to classical environmental noise},
author = {Andrea Beggi and Fabrizio Buscemi and Paolo Bordone},
journal= {arXiv preprint arXiv:1512.01989},
year = {2016}
}
Comments
18 pages, 23 figures The final publication will soon be available at Springer via http://dx.doi.org/10.1007/s11128-016-1334-8