Generating a Schrödinger-cat-like state via a coherent superposition of photonic operations
arXiv:1206.3745 · doi:10.1103/PhysRevA.85.063815
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.
References in corpus (15)
- Generation of a superposition of odd photon number states for quantum information networks
- Fault-tolerant linear optical quantum computing with small-amplitude coherent states
- Generation of Optical Coherent State Superpositions by Number-Resolved Photon Subtraction from Squeezed Vacuum
- Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction
- Recent developments in photon-level operations on travelling light fields
- Quantification of Macroscopic Quantum Superpositions within Phase Space
- Generating "squeezed" superpositions of coherent states using photon addition and subtraction
- Methods for Producing Optical Coherent State Superpositions
- Scheme for proving the bosonic commutation relation using single-photon interference
- Scheme for generating coherent state superpositions with realistic cross-Kerr nonlinearity
- Violation of Bell's inequality using classical measurements and non-linear local operations
- Failure of Local Realism Revealed by Extremely Coarse-Grained Measurements
- Non-Gaussian states from continuous-wave Gaussian light sources
- Large amplitude coherent state superposition generated by a time-separated two-photon subtraction from a continuous wave squeezed vacuum
- Temporally multiplexed superposition states of continuous variables