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A Continuous Variable Quantum Switch

Tillman, Ian; Vasantam, Thirupathaiah; Seshadreesan, Kaushik P.

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Ian Tillman

Kaushik P. Seshadreesan


The continuous quadratures of a single mode of the light field present a promising avenue to encode quantum information. By virtue of the infinite dimensionality of the associated Hilbert space, quantum states of these continuous variables (CV) can enable higher communication rates compared to single photon-based qubit encodings. Quantum repeater protocols that are essential to extend the range of quantum communications at enhanced rates over direct transmission have also been recently proposed for CV quantum encodings. Here we present a quantum repeating switch for CV quantum encodings that caters to multiple communication flows. The architecture of the switch is based on quantum light sources, detectors, memories, and switching fabric, and the routing protocol is based on a Max- Weight scheduling policy that is throughput optimal. We present numerical results on an achievable bipartite entanglement request rate region for multiple CV entanglement flows that can be stably supported through the switch. We elucidate our results with the help of exemplary 3-flow networks.


Tillman, I., Vasantam, T., & Seshadreesan, K. P. (2022). A Continuous Variable Quantum Switch. .

Conference Name IEEE Quantum Week 2022 - International Conference on Quantum Computing and Engineering (QCE)
Conference Location Broomfield, Colorado
Acceptance Date Jun 27, 2022
Publication Date 2022-11
Deposit Date Oct 6, 2022
Publicly Available Date Oct 6, 2022
Publisher Institute of Electrical and Electronics Engineers
Pages 365-371
Additional Information September 18–23, 2022


Accepted Conference Proceeding (958 Kb)

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