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Open Physics

formerly Central European Journal of Physics

Editor-in-Chief: Seidel, Sally

Managing Editor: Lesna-Szreter, Paulina

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Volume 13, Issue 1

Issues

Volume 13 (2015)

The role of coherence on two-particle quantum walks

Li-Hua Lu
  • Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, P. R. China
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Shan Zhu
  • Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, P. R. China
  • Collaborative Innovation Center of Advanced Microstructures, Nanjing, P. R. China
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ You-Quan Li
  • Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, P. R. China
  • Collaborative Innovation Center of Advanced Microstructures, Nanjing, P. R. China
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2015-11-25 | DOI: https://doi.org/10.1515/phys-2015-0042

Abstract

We investigate the dynamical properties of the two-boson quantum walk in systems with different degrees of coherence, and where the effect of the coherence on the two-boson quantum walk can be naturally introduced. A general analytical expression for the two-boson correlation function, for both pure states and mixed states, is given.We propose a possible two-photon quantum-walk scheme with a mixed initial state, and find that the twophoton correlation function and the average distance between two photons can be influenced by the initial photon distribution, the relative phase, or the degree of coherence. The propagation features of our numerical results can be explained by our analytical two-photon correlation function.

Keywords: wo-particle quantum walk; degree of coherence; two-photon correlation function; pure state; mixed state

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About the article

Received: 2015-02-06

Accepted: 2015-10-13

Published Online: 2015-11-25


Citation Information: Open Physics, Volume 13, Issue 1, ISSN (Online) 2391-5471, DOI: https://doi.org/10.1515/phys-2015-0042.

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©2015 Li-Hua Lu et al. . This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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