[9p-F212-1~16] KS.2 Quantum Information Engineering Group

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9p-F212-8] Shelving Readout and Raman-Transition-Based Initialization of a Multimode Superconducting Qubit

〇Masato Shigefuji¹, Shotaro Shirai^2,1, Atsushi Noguchi^1,2,3 (1.KIS Univ. of Tokyo, 2.RQC RIKEN, 3.InaRIS)

Keywords:

Superconducting qubits,Qubit readout,Qubit Initialization

Fast and accurate readout and initialization are essential for quantum error correction. In superconducting qubits, dispersive readout with a detuned resonator is commonly used. However, increasing the photon number can cause unwanted state leakage, and the resonator response can limit the readout speed. In this work, we use a dimon with two modes that have very different external coupling strengths. This enables broadband, low-photon-number shelving readout and fast initialization based on the lifetime difference between the two modes.