Journal
NEW JOURNAL OF PHYSICS
Volume 15, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/15/2/023042
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Funding
- Australian Research Council [CE110001029, DP1094650]
- Australian Research Council [DP1094650] Funding Source: Australian Research Council
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A quantitative analysis is conducted on the impacts of experimental imperfections in the input state, the detector properties, and their interactions on photon-subtracted squeezed vacuum states in terms of a quantum non-Gaussian character witness and Wigner function. Limitations of the non-classicality and quantum non-Gaussian characteristic of Schrodinger kitten states are identified and addressed. The detrimental effects of a photon-number detector on the generation of odd Schrodinger kitten states at near-infrared wavelengths (similar to 860 nm) and telecommunication wavelengths (similar to 1550 nm) are presented and analysed. This analysis demonstrates that the high dark count probability of telecommunication-wavelength photon-number detectors significantly undermines the negativity of the Wigner function in Schrodinger kitten state generation experiments. For a one-photon-subtracted squeezed vacuum state at similar to 1550 nm, an avalanche photodiode-based photon-number-resolving detector provides no significant advantage over a non-photon-number-resolving detector when imperfections, such as dark count probability and inefficiency, are taken into account.
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