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Proceedings Paper

High-dimensional entanglement in quantum frequency combs (Conference Presentation)
Author(s): Chee Wei Wong; Zhenda Xie; Xiang Cheng; Kai-Chi Chang; Yoo Seung Lee; Xuan Cui; Alvin Peizhe Li

Paper Abstract

Quantum entanglement is a fundamental resource for secure information processing and communications. The canonical optical quantum information processing encodes a single qubit per photon, with remarkable demonstrations of secure quantum communications, linear optical quantum computing amongst others. Often the polarization qubit, a discrete variable with entangled Bell states, is used. Continuous variables such as energy-time modes and spatial modes, however, present a dramatically larger Hilbert space for quantum information processing. The high-dimensional entanglement capture more qubits per photon, enabling dramatically higher secure key rates over longer distances and with better error resilience. Here I will describe our results on high-dimensional entanglement in quantum frequency combs for dense quantum communications. We first demonstrate revival of the Hong-Ou-Mandel interferences, long postulated by theorists more than a decade ago, up to 19-dimensions and with visibilities up to 96.5%. The mode-locked two-photon state in high-dimensions is further witnessed through a stabilized Franson interferometer, as a generalized Bell’s inequality test and hyperentangled through multiple degrees-of-freedom. Entanglement revivals of the non-local interference at discrete time-bins are uncovered, up to 97.8% visibility, as a fundamental resource for dense secure information processing.

Paper Details

Date Published: 14 March 2018
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Proc. SPIE 10547, Advances in Photonics of Quantum Computing, Memory, and Communication XI, 105470D (14 March 2018); doi: 10.1117/12.2292463
Show Author Affiliations
Chee Wei Wong, Univ. of California, Los Angeles (United States)
Zhenda Xie, Univ. of California, Los Angeles (United States)
Xiang Cheng, Univ. of California, Los Angeles (United States)
Kai-Chi Chang, Univ. of California, Los Angeles (United States)
Yoo Seung Lee, Univ. of California, Los Angeles (United States)
Xuan Cui, Univ. of California, Los Angeles (United States)
Alvin Peizhe Li, Univ. of California, Los Angeles (United States)


Published in SPIE Proceedings Vol. 10547:
Advances in Photonics of Quantum Computing, Memory, and Communication XI
Zameer Ul Hasan; Philip R. Hemmer; Alan E. Craig; Alan L. Migdall, Editor(s)

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