Loss-tolerant parallelized Bell-state generation with a hybrid cat qudit

• URL: http://arxiv.org/abs/2509.08577v1
• Date: Wed, 10 Sep 2025 13:27:22 GMT
• Title: Loss-tolerant parallelized Bell-state generation with a hybrid cat qudit
• Authors: Z. M. McIntyre, W. A. Coish,
• Abstract summary: We present a protocol for parallelized Bell-pair generation.<n>By encoding a qudit in a basis of light-matter Schr"odinger's cat states, the loss of a photon in transit can be detected.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Having multiple Bell pairs shared by distant quantum registers provides a key resource for both quantum networks and distributed quantum computing. In this paper, we present a protocol for parallelized Bell-pair generation that uses the phase of a coherent light pulse to encode a qudit, enabling the simultaneous generation of multiple Bell pairs. By encoding a qudit in a basis of light-matter Schr\"odinger's cat states, the loss of a photon in transit can be detected through an $XX$ parity syndrome, allowing the backaction due to the lost photon to be deterministically corrected through single-qubit rotations. The protocol presented here is compatible with existing technologies in both optical and microwave (circuit QED) architectures, supporting near-term implementation across diverse quantum platforms.

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