Abstracts

Multiplexed quantum repeaters based on dual-species trapped-ion systems

Presenting Author: Kaushik Seshadreesan, University of Arizona
Contributing Author(s): Prajit Dhara, Norbert M. Linke, Edo Waks, Saikat Guha

Trapped ions form an advanced technology platform for quantum information processing with long qubit coherence times, high-fidelity quantum logic gates, optically active qubits, and a potential to scale up in size while preserving a high level of connectivity between qubits. These traits make them attractive not only for quantum computing, but also for quantum networking. Dedicated, special-purpose trapped-ion processors in conjunction with suitable interconnecting hardware can be used to form quantum repeaters that enable high-rate quantum communications between distant trapped-ion quantum computers in a network. In this regard, hybrid traps with two distinct species of ions, where one ion species can generate ion-photon entanglement that is useful for optically interfacing with the network and the other has long memory lifetimes, useful for qubit storage, has been proposed for entanglement distribution. We consider an architecture for a repeater based on such dual-species trapped-ion systems. We propose and analyze protocols based on spatial and temporal mode multiplexing for entanglement distribution across a line network of such repeaters. Our protocols offer enhanced rates compared to rates previously reported for such repeaters. We determine the ion resource requirements for attaining the enhanced rates, and the best rates attainable when constraints are placed on the number of ions.

Read this article online: https://arxiv.org/abs/2105.06707

(Session 5 : Thursday from 12:00pm-2:00 pm)

 

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