Minimizing resource overhead in fusion-based quantum computation using hybrid spin-photon devices

• URL: http://arxiv.org/abs/2412.08611v1
• Date: Wed, 11 Dec 2024 18:34:53 GMT
• Title: Minimizing resource overhead in fusion-based quantum computation using hybrid spin-photon devices
• Authors: Stephen C. Wein, Timothée Goubault de Brugière, Luka Music, Pascale Senellart, Boris Bourdoncle, Shane Mansfield,
• Abstract summary: We present three schemes for constructing a (2,2)-Shor-encoded 6-ring photonic resource state for fusion-based quantum computing. We benchmark these architectures by analyzing their ability to achieve the best-known loss tolerance threshold for fusion-based quantum computation.
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• Abstract: We present three schemes for constructing a (2,2)-Shor-encoded 6-ring photonic resource state for fusion-based quantum computing, each relying on a different type of photon source. We benchmark these architectures by analyzing their ability to achieve the best-known loss tolerance threshold for fusion-based quantum computation using the target resource state. More precisely, we estimate their minimum hardware requirements for fault-tolerant quantum computation in terms of the number of photon sources to achieve on-demand generation of resource states with a desired generation period. Notably, we find that a group of 12 deterministic single-photon sources containing a single matter qubit degree of freedom can produce the target resource state near-deterministically by exploiting entangling gates that are repeated until success. The approach is fully modular, eliminates the need for lossy large-scale multiplexing, and reduces the overhead for resource-state generation by several orders of magnitude compared to architectures using heralded single-photon sources and probabilistic linear-optical entangling gates. Our work shows that the use of deterministic single-photon sources embedding a qubit substantially shortens the path toward fault-tolerant photonic quantum computation.

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