Heralded single-photon source based on superpositions of squeezed states

Abstract

We propose a heralded single-photon source based on injecting a superposition of oppositely squeezed states onto a beam splitter. Our superposition of squeezed states is composed of only even photon number states (the number of photons is equal to $2,6,10,...$) meaning the probability for an emitted single photon given as a heralded single-photon event is higher than what one can achieve from the usual two-mode squeezed state. This enables one to realize an enhanced heralded single-photon source. We discuss how to create this superposition of squeezed states utilizing a single-mode squeezed state and the cross-Kerr nonlinearity. Our proposed method significantly improves the probability of emitting the heralded single photon compared to spontaneous parametric down-conversion.

arXiv comment8 pages, 9 figures, REVTeX; v2: minor corrections

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Cited by in corpus (5)

• Driven Multiphoton Qubit-Resonator Interactions
• Measurement-device-independent quantum-secret-sharing networks with linear Bell-state analysis
• Application and quantum properties of superpositions of oppositely squeezed states
• A heralded single-photon source implemented with second-order nonlinear photonic crystals
• Advancing the heralded photon-number-state characterization by understanding the interplay of experimental settings