Schrödinger's cat in an optical sideband

Abstract

We propose a method to subtract a photon from a double sideband mode of continuous-wave light. The central idea is to use phase modulation as a frequency sideband beamsplitter in the heralding photon subtraction scheme, where a small portion of the sideband mode is downconverted to the carrier frequency to provide a trigger photon. An optical Schrödinger's cat state is created by applying the propesed method to a squeezed state at 500MHz sideband, which is generated by an optical parametric oscillator. The Wigner function of the cat state reconstructed from a direct homodyne measurement of the 500MHz sideband modes shows the negativity of $W(0,0)=-0.088\pm 0.001$ without any loss corrections.

arXiv comment11 pages, 9 figures

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Cited by in corpus (18)

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• Photon-by-photon quantum light state engineering
• Numerical study of Wigner negativity in one-dimensional steady-state resonance fluorescence
• Quantum state engineering using weak measurement
• Quantum repeater via entangled phase modulated multimode coherent states
• Nonclassicalities of hybrid coherent states
• A low-noise resonant input transimpedance amplified photodetector
• Homodyne measurement with a Schrödinger cat state as a local oscillator
• Amplification of optical Schrödinger cat states with implementation protocol based on frequency comb
• Generalized squeezing as a witness
• The stellar decomposition of Gaussian quantum states
• Loss-tolerant concatenated Bell-state measurement with encoded coherent-state qubits for long-range quantum communication
• Conditional Entanglement Amplification via Non-Hermitian Superradiant Dynamics
• A no-go result on observing quantum superpositions
• Environment-Assisted Generation of Non-Gaussian Wavepacket Quantum States