Coherence of Quantum States after Noiseless Attenuation

Authors :: Shringarpure, S. U.
Nunn, C. M.
Pittman, T. B.
Franson, J. D.
Source :: Phys. Rev. A 105, 013704 (2022)
Publication Year :: 2021
Abstract: Attenuating a quantum state using a beam splitter will introduce noise and decoherence. Here we show that heralding techniques can be used to attenuate Schr\"odinger cat states and squeezed vacuum states without any noise or decoherence [Mi\v{c}uda et al., Phys. Rev. Lett. 109, 180503 (2012)]. Noiseless attenuation also preserves quantum interference effects in nonclassical states such as squeezed vacuum states.<br />Comment: 11 pages, 12 figures

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