Related papers: High-rate and high-fidelity modular interconnects between neutral atom quantum processors

High-rate and high-fidelity modular interconnects between neutral atom quantum processors

URL: http://arxiv.org/abs/2401.04075v1
Date: Mon, 8 Jan 2024 18:26:19 GMT
Title: High-rate and high-fidelity modular interconnects between neutral atom quantum processors
Authors: Yiyi Li, Jeff Thompson
Abstract summary: We propose an experimental protocol for generating entanglement between neutral ytterbium atom qubits using an optical cavity. A twisted ring cavity geometry suppresses many sources of error, allowing high fidelity entanglement generation. We estimate a spin-photon entanglement rate of $5 times 105$ s$-1$, and a Bell pair rate of $1.0times 105$ s$-1$, with an average fidelity near $0.999$.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Quantum links between physically separated modules are important for scaling many quantum computing technologies. The key metrics are the generation rate and fidelity of remote Bell pairs. In this work, we propose an experimental protocol for generating remote entanglement between neutral ytterbium atom qubits using an optical cavity. By loading a large number of atoms into a single cavity, and controlling their coupling using only local light shifts, we amortize the cost of transporting and initializing atoms over many entanglement attempts, maximizing the entanglement generation rate. A twisted ring cavity geometry suppresses many sources of error, allowing high fidelity entanglement generation. We estimate a spin-photon entanglement rate of $5 \times 10^5$ s$^{-1}$, and a Bell pair rate of $1.0\times 10^5$ s$^{-1}$, with an average fidelity near $0.999$. Furthermore, we show that the photon detection times provide a significant amount of soft information about the location of errors, which may be used to improve the logical qubit performance. This approach provides a practical path to scalable modular quantum computing using neutral ytterbium atoms.

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