244th RQC Seminar

• 講演者

  Prof. XueYue (Sherry) Zhang
  ( Columbia University )

• 日程

  2025年11月7日(金), 13:00 - 14:00 (1:00p.m.-2:00p.m)

• 開催場所

  ハイブリッド（Zoom,
  Large Meeting Room, 2F, Welfare and Conference Building, Wako Campus / 統合支援施設2階 大会議室室 (C61))

• 講演タイトル

  Bridging the Connectivity Gap with Photons in Waveguides

• お問合せ

  yasunobu.nakamura[at]riken.jp

講演概要
An architecture with high connectivity lays the groundwork for studying crucial topics in quantum information science. Among them are quantum computation involving non-local gates and quantum simulations of long-range interacting phases of matter that are challenging to model classically.
However, many scalable quantum platforms feature nearest-neighbor interaction because of their local nature of coupling. In this talk, I will discuss our approach to going beyond this limit by utilizing the photon-mediated interaction, which enables us to build a scalable quantum simulator architecture based on superconducting qubits. Here, the long-range qubit-qubit interaction is mediated via an extensible quantum bus constructed from a microwave photonic bandgap metamaterial. As a demonstration, we realize a 10-qubit simulator of the one-dimensional Bose-Hubbard model with in-situ tunability of both the hopping range and the on-site interaction. We characterize the Hamiltonian using a quantum-chaos-based protocol from many-body quench dynamics and observe the effect of tunable long-range hopping, showing a crossover from integrable to ergodic many-body evolution.
Towards connecting quantum emitters using optical photons, I will also briefly discuss our recent work on integrating T-centers with nanophotonic cavity arrays coupled to silicon waveguides.