Generating scalable graph states in an atom-nanophotonic interface

TL;DR

This paper presents a method for generating high-fidelity, scalable graph states in atom-nanophotonic systems using state carving and adiabatic transport, advancing quantum computation and entanglement applications.

Contribution

It introduces a systematic protocol for scalable graph state generation in atom-nanophotonic interfaces with state carving and optimized probabilistic methods.

Findings

High-fidelity graph states can be prepared in 1D and 2D.

State fidelity depends on multi-qubit carving and photon probing.

Protocol enables scalable, high-dimensional graph states for quantum applications.

Abstract

Scalable graph states are essential for measurement-based quantum computation and many entanglement-assisted applications in quantum technologies. Generation of these multipartite entangled states requires a controllable and efficient quantum device with delicate design of generation protocol. Here we propose to prepare high-fidelity and scalable graph states in one and two dimensions, which can be tailored in an atom-nanophotonic cavity via state carving technique. We propose a systematic protocol to carve out unwanted state components, which facilitates scalable graph states generations via adiabatic transport of a definite number of atoms in optical tweezers. An analysis of state fidelity is also presented, and the state preparation probability can be optimized via multiqubit state carvings and sequential single-photon probes. Our results showcase the capability of an atom-nanophotonic interface for creating graph states and pave the way toward novel problem-specific applications using scalable high-dimensional graph states with stationary qubits.