Coherence of Quantum States after Noiseless Attenuation
arXiv:2107.04582 · doi:10.1103/PhysRevA.105.013704
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 Schrödinger cat states and squeezed vacuum states without any noise or decoherence [Mičuda et al., Phys. Rev. Lett. 109, 180503 (2012)]. Noiseless attenuation also preserves quantum interference effects in nonclassical states such as squeezed vacuum states.
11 pages, 12 figures
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