Persistent quantum beats and long-distance entanglement from waveguide-mediated interactions.

Journal Article (Journal Article)

We study photon-photon correlations and entanglement generation in a one-dimensional waveguide coupled to two qubits with an arbitrary spatial separation. To treat the combination of nonlinear elements and 1D continuum, we develop a novel Green function method. The vacuum-mediated qubit-qubit interactions cause quantum beats to appear in the second-order correlation function. We go beyond the Markovian regime and observe that such quantum beats persist much longer than the qubit lifetime. A high degree of long-distance entanglement can be generated, increasing the potential of waveguide-QED systems for scalable quantum networking.

Full Text

Duke Authors

Cited Authors

  • Zheng, H; Baranger, HU

Published Date

  • March 12, 2013

Published In

Volume / Issue

  • 110 / 11

Start / End Page

  • 113601 -

PubMed ID

  • 25166530

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.110.113601


  • eng