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Quantum Information Processing

, Volume 13, Issue 6, pp 1313–1329 | Cite as

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

  • C. M. ChandrashekarEmail author
  • Thomas Busch
Article

Abstract

We study the effect of noise on the transport of a quantum state from a closed loop of \(n\)-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.

Keywords

Initial Position Closed Loop Quantum Correlation Transport Efficiency Quantum Walk 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We would like to acknowledge valuable discussions with J. Goold and R. Dorner. This project was supported by Science Foundation Ireland under Project No. 10/IN.1/I2979.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Physics DepartmentUniversity College CorkCorkIreland
  2. 2.Quantum Systems UnitOkinawa Institute of Science and Technology Graduate UniversityOkinawa Japan

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