RQC Seminar

240th RQC Seminar

• Speaker

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

• Date

  15:00-16:00 (3:00 p.m.-4:00 p.m.), October 24, 2025 Friday

• Venue

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

• Title

  Time-Domain Measurement-Based Quantum Computation

• Inquiries

  norilab_rqc_assist[at]ml.riken.jp

Abstract
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.