Amplification of realistic cat-like states by homodyne heralding

Abstract

We present a scheme for the amplification of Schrodinger cats that collapses two smaller states onto their constructive interference via a homodyne projection. We analyze the performance of the amplification in terms of fidelity and success rate when the input consists of either exact coherent state superpositions or of photon-subtracted squeezed vacua. The impact of imprecise homodyne detection and of impure squeezing is quantified. We also assess the scalability of iterated amplifications.

11 pages, 15 figures

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Cited by in corpus (4)

• Characterizations and Quantifications of Macroscopic Quantumness and Its Implementations using Optical Fields
• Loss-resilient photonic entanglement swapping using optical hybrid states
• Assessments of macroscopicity for quantum optical states
• Iterative tailoring of optical quantum states with homodyne measurements