Entanglement sudden death and revival in quantum dark-soliton qubits

Muzzamal I. Shaukat, Eduardo V. Castro, and Hugo Terças
Phys. Rev. A 98, 022319 – Published 16 August 2018

Abstract

We study the finite time entanglement dynamics between two dark-soliton qubits due to quantum fluctuations in quasi-one-dimensional Bose-Einstein condensates. Recently, dark solitons are proved to be an appealing platform for qubits due to their appreciably long lifetime. We explore the entanglement decay for an entangled state of two phonon coherences and the qubits to be in the diagonal basis of so-called Dicke states. We observe the collapse and revival of the entanglement, depending critically on the collective damping term but independent of the qubit-qubit interaction for both initial states. The collective behavior of the dark-soliton qubits demonstrate the dependence of entanglement evolution on the interatomic distance.

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  • Received 21 June 2018

DOI:https://doi.org/10.1103/PhysRevA.98.022319

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Muzzamal I. Shaukat1,2,*, Eduardo V. Castro1,3, and Hugo Terças4,†

  • 1CeFEMA, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
  • 2University of Engineering and Technology, Lahore (RCET Campus), 52250, Pakistan
  • 3Centro de Física das Universidades do Minho e Porto, Departamento de Física e Astronomia, Faculdade de Ciéncias, Universidade do Porto, 4169-007 Porto, Portugal
  • 4Instituto de Plasmas e Fusão Nuclear, 1049-001 Lisboa, Portugal

  • *muzzamalshaukat@gmail.com
  • hugo.tercas@tecnico.ulisboa.pt

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Issue

Vol. 98, Iss. 2 — August 2018

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