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One-dimensional waveguide coupled to multiple qubits: Photon-photon correlations

Publication ,  Journal Article
Fang, YLL; Zheng, H; Baranger, HU
Published in: EPJ Quantum Technology
December 1, 2014

For a one-dimensional (1D) waveguide coupled to two or three qubits, we show that the photon-photon correlations have a wide variety of behavior, with structure that depends sensitively on the frequency and on the qubit-qubit separation L. We study the correlations by calculating the second-order correlation function g 2 (t) in which the interference among the photons multiply scattered from the qubits causes rich structure. In one case, for example, transmitted and reflected photons are both bunched initially, but then become strongly anti-bunched for a long time interval. We first calculate the correlation function g2(t) including non-Markovian effects and then show that a much simpler Markovian treatment, which can be solved analytically, is accurate for small qubit separation. As a result, the non-classical properties of microwaves in a 1D waveguide coupled to many superconducting qubits with experimentally accessible separation L could be readily explored with our approach.

Duke Scholars

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Published In

EPJ Quantum Technology

DOI

EISSN

2196-0763

Publication Date

December 1, 2014

Volume

1

Issue

1

Related Subject Headings

  • 5108 Quantum physics
  • 0906 Electrical and Electronic Engineering
  • 0206 Quantum Physics
  • 0105 Mathematical Physics
 

Citation

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Fang, Y. L. L., Zheng, H., & Baranger, H. U. (2014). One-dimensional waveguide coupled to multiple qubits: Photon-photon correlations. EPJ Quantum Technology, 1(1). https://doi.org/10.1140/epjqt3
Fang, Y. L. L., H. Zheng, and H. U. Baranger. “One-dimensional waveguide coupled to multiple qubits: Photon-photon correlations.” EPJ Quantum Technology 1, no. 1 (December 1, 2014). https://doi.org/10.1140/epjqt3.
Fang YLL, Zheng H, Baranger HU. One-dimensional waveguide coupled to multiple qubits: Photon-photon correlations. EPJ Quantum Technology. 2014 Dec 1;1(1).
Fang, Y. L. L., et al. “One-dimensional waveguide coupled to multiple qubits: Photon-photon correlations.” EPJ Quantum Technology, vol. 1, no. 1, Dec. 2014. Scopus, doi:10.1140/epjqt3.
Fang YLL, Zheng H, Baranger HU. One-dimensional waveguide coupled to multiple qubits: Photon-photon correlations. EPJ Quantum Technology. 2014 Dec 1;1(1).
Journal cover image

Published In

EPJ Quantum Technology

DOI

EISSN

2196-0763

Publication Date

December 1, 2014

Volume

1

Issue

1

Related Subject Headings

  • 5108 Quantum physics
  • 0906 Electrical and Electronic Engineering
  • 0206 Quantum Physics
  • 0105 Mathematical Physics