240th RQC Seminar

• 講演者

  Mr. Chen Po-Yang
  ( National Taiwan Normal University )

• 日程

  2025年10月24日(金), 15:00 - 16:00 (3:00 p.m. - 4:00 p.m.)

• 開催場所

  オンサイト（ Seminar Room 345-347 at Wako Main Research Building 3F / 研究本館3階 セミナー室 (345-347) (C01))

• 講演タイトル

  Time-Domain Measurement-Based Quantum Computation

• お問合せ

  norilab_rqc_assist[at]ml.riken.jp

講演概要
As a universal quantum computing paradigm, measurement-based quantum computing (MBQC) performs computation through sequential measurements on a cluster state, with single-qubit corrections applied afterward. However, generating large-scale cluster states remains experimentally challenging. Here, we exploit quantum reset operations to formulate a time-domain MBQC scheme that significantly reduces resource requirements and breaks the limitation of the physical system configuration. Remarkably, with resets, we show that a two-qubit cluster state is sufficient to implement universal quantum gates within the MBQC framework. Specifically, we analytically prove that any MBQC protocol based on a linear N-qubit cluster state, such as general single-qubit rotation gates, can be realized using only a two-qubit cluster state with reset operation. Likewise, for protocols based on a T-shaped cluster state, the time-domain approach reduces the requirement to a three-qubit cluster state. Notably, even an MBQC CNOT gate can be implemented with only two qubits. Finally, we experimentally demonstrate our scheme on an IBM quantum processor, highlighting the feasibility of time-domain MBQC with current technology.