Noise-enhanced quantum transport on a closed loop using quantum walks

Noise-enhanced quantum transport on a closed loop using quantum walks We study the effect of noise on the transport of a quantum state from a closed loop of $$n$$ n -sites with one of the sites as a sink. Using a discrete-time quantum walk dynamics, we demonstrate that the transport efficiency can be enhanced with noise when the number of sites in the loop is small and reduced when the number of sites in the loop grows. By using the concept of measurement induced disturbance, we identify the regimes in which genuine quantum effects are responsible for the enhanced transport. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Noise-enhanced quantum transport on a closed loop using quantum walks

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Publisher
Springer Journals
Copyright
Copyright © 2014 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-014-0730-1
Publisher site
See Article on Publisher Site

Abstract

We study the effect of noise on the transport of a quantum state from a closed loop of $$n$$ n -sites with one of the sites as a sink. Using a discrete-time quantum walk dynamics, we demonstrate that the transport efficiency can be enhanced with noise when the number of sites in the loop is small and reduced when the number of sites in the loop grows. By using the concept of measurement induced disturbance, we identify the regimes in which genuine quantum effects are responsible for the enhanced transport.

Journal

Quantum Information ProcessingSpringer Journals

Published: Jan 28, 2014

References

  • The effects of connectivity, coherence, and trapping on energy transfer in simple light-harvesting systems studied using the Haken-Strobl model with diagonal disorder
    Gaab, KM; Bardeen, CJ
  • Coherently wired light-harvesting in photosynthetic marine algae at ambient temperature
    Collini, E; Wong, CY; Wilk, KE; Curmi, PMG; Brumer, P; Scholes, GD
  • Continuous-time quantum walks: models for coherent transport on complex networks
    Muelken, O; Blumen, A
  • Quantum walks of correlated photons
    Peruzzo, A; Lobino, M; Matthews, JCF; Matsuda, N; Politi, A; Poulios, K; Zhou, X; Lahini, Y; Ismail, N; Wörhoff, K; Bromberg, Y; Silberberg, Y; Thompson, MG; OBrien, JL

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