Generating GKP states using quantum dots inside a strongly coupled cavity

• URL: http://arxiv.org/abs/2608.10604v1
• Date: Tue, 11 Aug 2026 07:46:49 GMT
• Title: Generating GKP states using quantum dots inside a strongly coupled cavity
• Abstract summary: GKP states enable fault-tolerant CV quantum computation, but their generation remains experimentally challenging.<n>We present a realistic and scalable protocol for generating finite-energy resource states, specifically the qunaught state.<n>Our scheme combines deterministic squeezed cat-state generation, cat-breeding protocols, and homodyne measurements.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: GKP states enable fault-tolerant CV quantum computation, but their generation remains experimentally challenging due to their highly non-Gaussian and infinite-energy ideal structure. In this work, we present a realistic and scalable protocol for generating finite-energy resource states, specifically the qunaught state, using Schrodinger cat states generated in a strongly coupled quantum dot-cavity system. Our scheme combines deterministic squeezed cat-state generation, cat-breeding protocols, and homodyne measurements. Using numerical simulations, we analyze the role of various parameters of the quantum dot-cavity system in the generation of practical qunaught states. Furthermore, we quantify the trade-off between the fidelity and generation probability of these states and exploit the fact that accepting a structured set of homodyne outcomes can significantly enhance the overall success rate. The proposed approach is compatible with integrated photonics and telecom wavelengths, offering a promising route toward scalable CV quantum information processing.

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