Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.113601
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Funding
- U.S. NSF [PHY-10-68698]
- Fitzpatrick Institute for Photonics at Duke University
- Division Of Physics
- Direct For Mathematical & Physical Scien [1068698] Funding Source: National Science Foundation
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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. DOI: 10.1103/PhysRevLett.110.113601
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