A Scheme for Deterministic N-photon State Generation Using Lithium Niobate on Insulator Device

TL;DR

This paper proposes a scalable, integrated lithium niobate on insulator scheme for deterministic N-photon state generation, utilizing photon-number doubling units with high-quality resonators suitable for quantum information applications.

Contribution

It introduces a feasible, scalable scheme for N-photon state generation using integrated lithium niobate circuits with photon-number doubling units.

Findings

Uses high-Q resonators and mW-level power for photon conversion.

Demonstrates N-photon, cluster, and GHZ state generation schemes.

Compatible with current fabrication technologies.

Abstract

Large-photon-number quantum state is a fundamental but non-resolved request for practical quantum information applications. Here we propose an N-photon state generation scheme that is feasible and scalable, using lithium niobate on insulator circuits. Such scheme is based on the integration of a common building block called photon-number doubling unit (PDU), for deterministic single-photon parametric down-conversion and up-conversion. The PDU relies on 10^7-optical-quality-factor resonator and mW-level on-chip power, which is within the current fabrication and experiment limits. N-photon state generation schemes, with cluster and GHZ state as examples, are shown for different quantum tasks.