https://doi.org/10.1140/epjp/s13360-020-00373-0
Regular Article
Phonon-mediated quantum discord in dark solitons
1
Instituto Superior Técnico, University of Lisbon and Instituto de Telecomunicações, Torre Norte, Av. Rovisco Pais 1, Lisbon, Portugal
2
University of Engineering and Technology, Lahore (RCET Campus), Lahore, Pakistan
3
LPHE-Modeling and Simulation, Faculty of Sciences, University Mohammed V, Rabat, Morocco
4
Instituto Superior Técnico and Instituto de Plasmas e Fusão Nuclear, Lisbon, Portugal
5
Department of Physics, Faculty of Sciences, University Ibn Tofail, Kenitra, Morocco
6
Abdus Salam International Centre for Theoretical Physics, Miramare, Trieste, Italy
* e-mail: muzzamalshaukat@gmail.com
Received:
31
October
2019
Accepted:
1
April
2020
Published online:
15
April
2020
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.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020
