Phase estimation in lossy optical interferometry without a reference beam
Year: 2025
Type: preprint
Abstract: We investigate phase estimation in a lossy interferometer using entangled coherent states, with particular focus on a scenario where no reference beam is employed. By calculating the quantum Fisher information, we reveal two key results: (1) the metrological equivalence between scenarios with and without a reference beam, established under ideal lossless conditions for the two-phase-shifting configuration,breaks down in the presence of photon loss, and (2) the pronounced inferior performance of entangled coherent states relative to NOON states, observed in the presence of a reference beam, disappears in its absence.
Source: arXiv (Cornell University)
Authors: Tang, Jun, Wang, Dong-Qing, Zhong, Wei, Zhou, Lan, Sheng, Yu-Bo
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6966822880
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