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Quantum dark solitons as qubits in Bose-Einstein condensates

M. I. Shaukat, E. V. Castro, and H. Terças
Phys. Rev. A 95, 053618 – Published 18 May 2017
Physics logo See Synopsis: A Dark Side for Qubits

Abstract

We study the possibility of using dark solitons in quasi-one-dimensional Bose-Einstein condensates to produce two-level systems (qubits) by exploiting the intrinsic nonlinear and coherent nature of the matter waves. We calculate the soliton spectrum and the conditions for a qubit to exist. We also compute the coupling between the phonons and the solitons and investigate the emission rate of the qubit in that case. Remarkably, the qubit lifetime is estimated to be of the order of a few seconds, being only limited by the dark-soliton “death” due to quantum evaporation.

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  • Received 26 January 2017

DOI:https://doi.org/10.1103/PhysRevA.95.053618

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Synopsis

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A Dark Side for Qubits

Published 18 May 2017

Dark solitons in a Bose-Einstein condensate could, according to calculations, function as qubits with long lifetimes.

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Authors & Affiliations

M. I. Shaukat1,2,*, E. V. Castro1, and H. Terças3,4,†

  • 1CeFEMA, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
  • 2University of Engineering and Technology, Lahore (RCET Campus), Pakistan
  • 3Instituto de Plasmas e Fusão Nuclear, Lisboa, Portugal
  • 4Instituto de Telecomunicações, Lisboa, Portugal

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

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Issue

Vol. 95, Iss. 5 — May 2017

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