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Quantum networking and quantum transduction

As established by Claude Shannon, the communication rate over a channel is limited by the channel capacity. Entanglement can break the classical limits of communication over noisy channels as proposed by Bennett et al. in 2002. Yet experimental verification of this phenomena was missing until 2020–2021 when experimental collaborators and my group jointly proposed and verified the first entanglement-assisted communication protocol that beats the classical capacity of traditional communication schemes without entanglement [1,2]. Our efforts now focus on the network generalization of such protocols, including the initial results on a multi-access channel [3] and more general network communication scenarios. 

Another important direction we are recently working on is quantum transduction [4,5].

We are a part of:

NSF Engineering Research Center for Quantum Networks

Recent publications:

  • [1] Practical Route to Entanglement-Assisted Communication Over Noisy Bosonic Channels, H. Shi, Z. Zhang, and Q. Zhuang, Phys. Rev. Appl. 13, 034029 (2020).

  • [2] Entanglement-Assisted Communication Surpassing the Ultimate Classical Capacity, S. Hao, H. Shi, W. Li, J. H. Shapiro, Q. Zhuang, and Z. Zhang, Phys. Rev. Lett. 126, 250501 (2021).

  • [3] Entanglement-Assisted Capacity Regions and Protocol Designs for Quantum Multiple-Access Channels, H. Shi, M.-H. Hsieh, S. Guha, Z. Zhang, and Q. Zhuang, Npj Quantum Inf. 7, 74 (2021).

  • [4] Deterministic Microwave-Optical Transduction Based on Quantum Teleportation, J. Wu, C. Cui, L. Fan and Q. Zhuang, Phys. Rev. Applied 16, 064044 (2021).             

  • [5] Entangling remote microwave quantum computers with hybrid entanglement swap and variational distillation, B, Zhang, J. Wu, L. Fan and Q. Zhuang, arXiv:2206.14682 (2022).
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