Non-Gaussian state generation with time-gated photon detection

Abstract

Non-Gaussian states of light, which are essential in fault-tolerant and universal optical quantum computation, are typically generated by a heralding scheme using photon detectors. Recently, it is theoretically shown that the large timing jitter of the photon detectors deteriorates the purity of the generated non-Gaussian states [T. Sonoyama, $\text{et al}$., Phys. Rev. A $\text{105}$, 043714 (2022)]. In this study, we generate non-Gaussian states with Wigner negativity by time-gated photon detection. We use a fast optical switch for time gating to effectively improve the timing jitter of a photon-number-resolving detector based on transition edge sensor from 50 ns to 10 ns. As a result, we generate non-Gaussian states with Wigner negativity of $-0.011\pm 0.004$, which cannot be observed without the time-gated photon detection method. These results confirm the effect of the timing jitter on non-Gaussian state generation experimentally for the first time and provide the promising method of high-purity non-Gaussian state generation.

6 pages, 4 figures

References in corpus (12)

• Generation of a superposition of odd photon number states for quantum information networks
• Generation of Optical Coherent State Superpositions by Number-Resolved Photon Subtraction from Squeezed Vacuum
• Entangled Fock states for Robust Quantum Optical Metrology, Imaging, and Sensing
• Photon pair-state preparation with tailored spectral properties by spontaneous four-wave mixing in photonic-crystal fiber
• Generating superposition of up-to three photons for continuous variable quantum information processing
• Generation of highly pure Schrödinger's cat states and real-time quadrature measurements via optical filtering
• Non-Gaussian quantum state generation by multi-photon subtraction at the telecommunication wavelength
• Large amplitude coherent state superposition generated by a time-separated two-photon subtraction from a continuous wave squeezed vacuum
• Could Gaussian regenerative stations act as quantum repeaters?
• Quantifying quantum coherence of optical cat states
• Generation of Schrödinger cat states with Wigner negativity using continuous-wave low-loss waveguide optical parametric amplifier
• Analysis of optical quantum state preparation using photon detectors in the finite-temporal-resolution regime

Cited by in corpus (4)

• Generation of multi-photon Fock states at telecommunication wavelength using picosecond pulsed light
• Quantum interference in the resonance fluorescence of a $J=1/2$-$J^{\prime }=1/2$ atomic system: Quantum beats, nonclassicality, and non-Gaussianity
• Detector of microwave photon pairs based on a Josephson photomultiplier
• Adaptive Non-Gaussian Quantum State Engineering