Linear and continuous variable spin-wave processing using a cavity-coupled atomic ensemble

• URL: http://arxiv.org/abs/2109.15246v1
• Date: Thu, 30 Sep 2021 16:24:44 GMT
• Title: Linear and continuous variable spin-wave processing using a cavity-coupled atomic ensemble
• Authors: Kevin C. Cox, Przemyslaw Bienias, David H. Meyer, Donald P. Fahey, Paul D. Kunz, Alexey V. Gorshkov
• Abstract summary: We conduct a theoretical analysis of methods to create a high-capacity universal quantum processor and network node. We describe how to establish linear quantum processing using a scheme in a rubidium-atom system. We propose to use the spin-wave processor for continuous-variable quantum information processing.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Spin-wave excitations in ensembles of atoms are gaining attention as a quantum information resource. However, current techniques with atomic spin waves do not achieve universal quantum information processing. We conduct a theoretical analysis of methods to create a high-capacity universal quantum processor and network node using an ensemble of laser-cooled atoms, trapped in a one-dimensional periodic potential and coupled to a ring cavity. We describe how to establish linear quantum processing using a lambda-scheme in a rubidium-atom system, calculate the expected experimental operational fidelities. Second, we derive an efficient method to achieve linear controllability with a single ensemble of atoms, rather than two-ensembles as proposed in [K. C. Cox et al. Spin-Wave Quantum Computing with Atoms in a Single-Mode Cavity, preprint 2021]. Finally, we propose to use the spin-wave processor for continuous-variable quantum information processing and present a scheme to generate large dual-rail cluster states useful for deterministic computing.

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