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Temporal Coherence of an Optical Field in the Presence of Entanglement

Yunxiao Zhang, Nan Huo, Wen Zhen Zhao, Xueshi Guo, Xiaoying Li, Z. Y. Ou

Published Jan 1, 2022• 0 citations
Publisher

Abstract

We demonstrate in SU(1,1) interferometers that temporal coherence of an optical field depends on not only its spectrum but also its entanglement property. This study reveals the relationship among interference visibility, photon distinguishability and entanglement.
DOI
10.1364/quantum.2022.qth4a.6

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Quantum interferometers represent a powerful class of devices that exploit the principles of quantum mechanics to achieve highly sensitive measurements and precise detection capabilities. In classical interferometry, light waves or matter waves combine and interfere, resulting in constructive or destructive interference patterns that encode information about the system being studied. In the quantum realm, interferometers leverage the unique properties of quantum states, such as superposition and entanglement, to surpass the sensitivity limits imposed by classical physics. We developed a new class of quantum interferometers, namely, the temporal SU(1,1) interferometer. Here, we present the code for numerically comparing classical SU(2) interferometer, regular quantum SU(1,1) interferometer, and our temporal SU(1,1) interferometer.
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