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 (3)

• Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
• Optical synthesis of large-amplitude squeezed coherent-state superpositions with minimal resources
• Iterative tailoring of optical quantum states with homodyne measurements

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• 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