Experimental demonstration of a versatile and scalable scheme for iterative generation of non-Gaussian states of light

Abstract

Non-Gaussian states of light, such as GKP states, are essential resources for optical continuous-variable quantum computing. The ability to efficiently produce these states would open up tremendous prospects for quantum technologies in general and fault-tolerant quantum computing in particular. This letter demonstrates a versatile method using a quantum memory cavity to overcome the probabilistic nature of the breeding protocols and generate non-Gaussian states at high rates with scalability perspectives. The performances of our experimental setup are illustrated with the generation of Schrödinger cat states of amplitude alpha = 1.63 with a fidelity of more than 60% at a generation rate in the kHz range, which is higher than the state of the art for such states.

4 pages, 4 figures

References in corpus (16)

• Encoding a qubit in an oscillator
• Iterative maximum-likelihood reconstruction in quantum homodyne tomography
• Deterministic creation of entangled atom-light Schrödinger-cat states
• Conditional Production of Superpositions of Coherent States with Inefficient Photon Detection
• Breeding the optical Schroedinger's cat state
• All-Gaussian universality and fault tolerance with the Gottesman-Kitaev-Preskill code
• Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
• All-optical generation of states for "Encoding a qubit in an oscillator"
• Optical synthesis of large-amplitude squeezed coherent-state superpositions with minimal resources
• Non-Gaussian and Gottesman-Kitaev-Preskill state preparation by photon catalysis
• Practical, Reliable Error Bars in Quantum Tomography
• Quantum storage of single-photon and two-photon Fock states with an all-optical quantum memory
• Proposal for a loophole-free violation of Bell inequalities with a set of single photons and homodyne measurements
• Practical purification scheme for decohered coherent-state superpositions via partial homodyne detection
• High production rate of single-photon and two-photon Fock states for quantum state engineering
• Iterative tailoring of optical quantum states with homodyne measurements

Cited by in corpus (6)

• Quantum non-Gaussian high Fock states of light pulses and their superpositions
• Certification of stellar ranks of quantum states of light with a pair of click detectors
• Extensible universal photonic quantum computing with nonlinearity
• Nonclassicality of multi-photon-added cat states
• Simplified scheme for continuous-variable entanglement distillation: multicopy distillation of Gaussian entanglement without heralding Gaussian measurements
• Scalable Optical Quantum State Synthesizer with Dual-Mode Resonator Memory