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8 March 2023 Dual fiber spectrometer for highly non-degenerate entanglement source
Adam J. Fallon, Daniel R. Hart, Evan J. Katz, Brian E. Vyhnalek, Ian A. Chin, John D. Lekki
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Proceedings Volume 12446, Quantum Computing, Communication, and Simulation III; 124460X (2023) https://doi.org/10.1117/12.2650914
Event: SPIE Quantum West, 2023, San Francisco, California, United States
Abstract
NASA is developing quantum metrology capabilities for potential space-based quantum components in future navigation and communications systems. Innate knowledge of component operation is key for the space qualification of these components. This paper focuses on the measurement and analysis of an important characteristic of an entanglement source, the joint spectrum. We describe a spectrometer based on dispersive optical fibers and present experimental measurements of the joint spectrum of a highly non-degenerate SPDC-based entanglement source that emits entangled photons in the near-infrared and telecommunications bands. How the analysis of such a joint spectrum could be applied to the modeling and simulation of entanglement swapping operations as possible extensions of quantum networks is examined. Lastly, we discuss how the separability of the two-photon state is quantified via Schmidt decomposition and how the degree of separability impacts the spectral purity of heralded single-photon emissions.
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Adam J. Fallon, Daniel R. Hart, Evan J. Katz, Brian E. Vyhnalek, Ian A. Chin, and John D. Lekki "Dual fiber spectrometer for highly non-degenerate entanglement source", Proc. SPIE 12446, Quantum Computing, Communication, and Simulation III, 124460X (8 March 2023); https://doi.org/10.1117/12.2650914
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KEYWORDS
Quantum entanglement
Quantum sources
Spectroscopy
Quantum networks
Quantum correlations
Dispersion
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