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Phonon-mediated quantum discord in dark solitons

Shaukat, M.

European Physical Journal Plus Vol. 135, Nº 4, pp. 1 - 14, April, 2020.

ISSN (print): 2190-5444
ISSN (online):

Journal Impact Factor: 2,760 (in )

Digital Object Identifier: 10.1140/epjp/s13360-020-00373-0

Abstract
We investigate the quantum correlation dynamics in dark-soliton qubits with a special attention to quantum discord. Recently, dark-soliton qubit exhibiting appreciably long lifetime is proved to be an excellent candidate for information processing. Depending on the precise distance between the dark-soliton qubits, the decay rate of Dicke symmetric and antisymmetric state is suppressed or enhanced. With the Renyi-2 entropy, we derive a simple analytical expression for the quantum discord and explore the generation and decay of correlation for different initial states. We believe that the present work could pave the stage for a new generation of quantum discord based purely on matter-wave phononics.