Tunable quantum entanglement of three qubits in a nonstationary cavity

Mirko Amico, Oleg L. Berman, and Roman Ya. Kezerashvili
Phys. Rev. A 96, 032328 – Published 18 September 2017

Abstract

We investigate the tunable quantum entanglement and the probabilities of excitations in a system of three qubits in a nonstationary cavity due to the dynamical Lamb effect, caused by nonadiabatic fast change of the boundary conditions of the cavity. The transition amplitudes and the probabilities of excitation of qubits due to the dynamical Lamb effect have been evaluated. The conditional concurrence and the conditional residual tangle for each fixed amount of created photons are introduced and calculated as measures of the pairwise or three-way dynamical quantum entanglement of the qubits. We also give a prescription on how to increase the values of those quantities by controlling the frequency of the cavity photons. A physical realization of the system with three superconducting qubits, coupled to a coplanar waveguide entangled due to the nonadiabatic fast change of boundary conditions of the cavity is proposed.

  • Received 27 April 2017
  • Revised 4 August 2017

DOI:https://doi.org/10.1103/PhysRevA.96.032328

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Quantum Information, Science & Technology

Authors & Affiliations

Mirko Amico, Oleg L. Berman, and Roman Ya. Kezerashvili

  • Physics Department, New York City College of Technology, The City University of New York, Brooklyn, New York 11201, USA and The Graduate School and University Center, The City University of New York, New York, New York 10016, USA

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Issue

Vol. 96, Iss. 3 — September 2017

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