Generation of optical Schrödinger's cat states by generalized photon subtraction

Abstract

We propose a high-rate generation method of optical Schrödinger's cat states. Thus far, photon subtraction from squeezed vacuum states has been a standard method in cat-state generation, but its constraints on experimental parameters limit the generation rate. In this paper, we consider the state generation by photon number measurement in one mode of arbitrary two-mode Gaussian states, which is a generalization of conventional photon subtraction, and derive the conditions to generate high-fidelity and large-amplitude cat states. Our method relaxes the constraints on experimental parameters, allowing us to optimize them and attain a high generation rate. Supposing realistic experimental conditions, the generation rate of cat states with large amplitudes ($|\alpha |\ge 2)$ can exceed megacounts per second, about $10^3$ to $10^6$ times better than typical rates of conventional photon subtraction. This rate would be improved further by the progress of related technologies. Ability to generate non-Gaussian states at a high rate is important in quantum computing using optical continuous variables, where scalable computing platforms have been demonstrated but preparation of non-Gaussian states of light remains as a challenging task. Our proposal reduces the difficulty of the state preparation and open a way for practical applications in quantum optics.

8 pages, 5 figures

References in corpus (14)

• Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency
• Universal Quantum Computation with Continuous-Variable Cluster States
• 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
• Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction
• Continuous variable entanglement on a chip
• Optical synthesis of large-amplitude squeezed coherent-state superpositions with minimal resources
• Continuous-wave 6-dB-squeezed light with 2.5-THz-bandwidth from single-mode PPLN waveguide
• Evaluating Performance of Photon-Number-Resolving Detectors
• Benchmarking photon number resolving detectors
• Efficient representation of Gaussian states for multi-mode non-Gaussian quantum state engineering via subtraction of arbitrary number of photons
• Conditional non-Gaussian quantum state preparation
• Deterministic generation of a four-component optical cat state
• Direct measurement of the Wigner function by photon-number-resolving detection

Cited by in corpus (49)

• Non-Gaussian Quantum States and Where to Find Them
• Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
• Non-Gaussian quantum state generation by multi-photon subtraction at the telecommunication wavelength
• Experimental preparation of multiphoton-added coherent states of light
• Measurement-based generation and preservation of cat and grid states within a continuous-variable cluster state
• All-photonic architectural roadmap for scalable quantum computing using Greenberger-Horne-Zeilinger states
• Generation of Flying Logical Qubits using Generalized Photon Subtraction with Adaptive Gaussian Operations
• Efficient backcasting search for optical quantum state synthesis
• Consideration of success probability and performance optimization in non-Gaussian continuous variable quantum teleportation
• Wave-function engineering via conditional quantum teleportation with non-Gaussian entanglement resource
• Sub-Planck structures and sensitivity of the superposed photon-added or photon-subtracted squeezed-vacuum states
• Quantum arbitrary waveform generator
• Fault-tolerant quantum computation by hybrid qubits with bosonic cat-code and single photons
• Generation of Highly Pure Single-Photon State at Telecommunication Wavelength
• Subtraction and Addition of Propagating Photons by Two-Level Emitters
• Boosting the generation rate of squeezed single-photon states by generalized photon subtraction
• Method to deterministically generate large-amplitude optical cat states
• Generation of squeezed Fock states by measurement
• Quantum repeater via entangled phase modulated multimode coherent states
• Schrödinger cat states prepared by logical gate with non-Gaussian resource state: effect of finite squeezing and efficiency versus monotones
• Fast Generation of High-Fidelity Mechanical Non-Gaussian States via Additional Amplifier and Photon Subtraction
• Heralded preparation of polarization entanglement via quantum scissors
• Compasslike states in a thermal reservoir and fragility of their nonclassical features
• Seeding Gaussian boson samplers with single photons for enhanced state generation
• Taming numerical errors in simulations of continuous variable non-Gaussian state preparation
• Extended analysis of distillation and purification of squeezed states of light
• A Quadratic Speedup in the Optimization of Noisy Quantum Optical Circuits
• Estimation of the set of states obtained in particle number measurement schemes
• Bosonic quantum error correction using squeezed Fock states
• Amplification of optical Schrödinger cat states with implementation protocol based on frequency comb
• Optimal sensing of photon addition and subtraction on nonclassical light
• Correlations for subsets of particles in symmetric states: what photons are doing within a beam of light when the rest are ignored
• Catability as a metric for evaluating superposed coherent states
• Two-mode light states before and after delocalized single-photon addition
• Comparison of Controlled-Z operation and beam-splitter transformation for generation of squeezed Fock states by measurement
• Sub-shot-noise sensitivity via superpositions of two deformed kitten states
• Adapting coherent-state superpositions in noisy channels
• Efficient optical cat state generation using squeezed few-photon superposition states
• Conditional Entanglement Amplification via Non-Hermitian Superradiant Dynamics
• Quantifying quantum correlation of quasi-Werner state and probing its suitability for quantum teleportation
• Nonclassical states of light induced via measurement in a bimodalsystem
• Deterministic Shaping of Quantum Light Statistics
• Linear-optical protocols for mitigating and suppressing noise in bosonic systems
• High-Rate Four Photon Subtraction from Squeezed Vacuum: Preparing Cat State for Optical Quantum Computation
• Simplified scheme for continuous-variable entanglement distillation: multicopy distillation of Gaussian entanglement without heralding Gaussian measurements
• Deterministic Gaussian conversion protocols for non-Gaussian single-mode resources
• Explicitly Quantum-parallel Computation by Displacements
• Maximum heralding probabilities of nonclassical-state generation from a two-mode Gaussian state via photon-counting measurements
• Scalable Optical Quantum State Synthesizer with Dual-Mode Resonator Memory