2012/06/13 by Chang-Woo Lee, Jinhyoung Lee, Hyunchul Nha +1 · 1 citation
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Beam splitter #Coherent states #Computer science #Interference (communication) #Interferometry #Laser #Mathematics #Neural Networks and Reservoir Computing #Optics #Parametric statistics #Photon #Photonic and Optical Devices #Photonics #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Quantum superposition #Scheme (mathematics) #Superposition principle #Telecommunications #physics.optics #quant-ph
paper · pdf · doi:10.1103/physreva.85.063815
published as Phys. Rev. A 85, 063815 (2012)
openalex publication_date 2012/06/13 · arxiv created 2012/06/17 · arxiv updated 2012/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.