RQC Seminar

163rd RQC Seminar

  • Speaker

    Ms. Aziza Almanakly
    ( Massachusetts Institute of Technology, USA )

  • Date

    16:00-17:00, October 31, 2024 (Thursday)

  • Venue

    Hybrid(ZOOM・ Wako C61 Welfare ＆ Conf. 2F Large Meeting Room/統合支援棟2階 大会議室）

  • Title

    Deterministic Remote Entanglement using a Chiral Quantum Interconnect

  • Inquiries

    rqc_info[at]ml.riken.jp

Abstract
Quantum interconnects facilitate entanglement distribution between non-local computational nodes. For superconducting processors, microwave photons are a natural means to mediate this distribution. However, many existing architectures limit node connectivity and directionality. In this work, we construct a chiral quantum interconnect between two nominally identical modules in separate microwave packages. We leverage quantum interference to emit and absorb microwave photons on demand and in a chosen direction between these modules. We optimize the protocol using model-free reinforcement learning to maximize absorption efficiency. By halting the emission process halfway through its duration, we generate remote entanglement between modules in the form of a four-qubit W state with 62.4 +/- 1.6% (leftward photon propagation) and 62.1 +/- 1.2% (rightward) fidelity, limited mainly by propagation loss. This quantum network architecture enables all-to-all connectivity between non-local processors for modular and extensible quantum computation.



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