Generating a Schrodinger-cat-like state via a coherent superposition of photonic operationsopen access
- Authors
- Lee, Chang-Woo; Lee, Jinhyoung; Nha, Hyunchul; Jeong, Hyunseok
- Issue Date
- Jun-2012
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW A, v.85, no.6, pp.1 - 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW A
- Volume
- 85
- Number
- 6
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/144762
- DOI
- 10.1103/PhysRevA.85.063815
- ISSN
- 1050-2947
- Abstract
- We propose an optical scheme to generate a superposition of coherent states with enhanced size adopting an interferometric setting at the single-photon level currently available in the laboratory. Our scheme employs a nondegenerate optical parametric amplifier together with two beam splitters so that the detection of single photons at the output conditionally implements the desired superposition of second-order photonic operations. We analyze our proposed scheme by considering realistic on-off photodetectors with nonideal efficiency in heralding the success of conditional events. A high-quality performance of our scheme is demonstrated in view of various criteria such as quantum fidelity, mean output energy, and measure of quantum interference.
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