Coherent dynamics of a photon-dressed qubit

M. P. Liul, C.-H. Chien, C.-Y. Chen, P. Y. Wen, J. C. Chen, Y.-H. Lin, S. N. Shevchenko, Franco Nori, and I.-C. Hoi

Phys. Rev. B 107, 195441 – Published 30 May 2023

Abstract

We consider the dynamics and stationary regime of a capacitively shunted transmon-type qubit in front of a mirror. The qubit is affected by probe and dressing signals. By varying the parameters of these signals and then analyzing the probe signal (reflected by the “atom plus mirror” system), it is possible to explore the system dynamics, which can be described by the Bloch equation. The obtained time-dependent occupation probabilities are related to the experimentally measured reflection coefficient. The study of this type of dynamics opens up new horizons for better understanding the “qubit plus mirror” circuit properties and the underlying physical processes, such as Landau-Zener-Stückelberg-Majorana transitions.

Received 7 December 2022
Revised 29 March 2023
Accepted 18 May 2023

DOI:https://doi.org/10.1103/PhysRevB.107.195441

Physics Subject Headings (PhySH)

Landau-Zener effect Quantum coherence & coherence measures Quantum control Quantum measurements

Superconducting qubits

Quantum master equation

Condensed Matter, Materials & Applied PhysicsQuantum Information, Science & Technology

Authors & Affiliations

M. P. Liul ^1,*, C.-H. Chien ^2,*, C.-Y. Chen², P. Y. Wen³, J. C. Chen ^2,4, Y.-H. Lin^2,4, S. N. Shevchenko ^1,†, Franco Nori ^5,6,7, and I.-C. Hoi^8,2,‡

¹B. Verkin Institute for Low Temperature Physics and Engineering, Kharkov 61103, Ukraine
²Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
³Department of Physics, National Chung Cheng University, Chiayi 621301, Taiwan
⁴Center for Quantum Technology, National Tsing Hua University, Hsinchu 30013, Taiwan
⁵Theoretical Quantum Physics Laboratory, Cluster for Pioneering Research, RIKEN, Wakoshi, Saitama 351-0198, Japan
⁶Quantum Computing Center, RIKEN, Wakoshi, Saitama 351-0198, Japan
⁷Department of Physics, The University of Michigan, Ann Arbor, Michigan 48109-1040, USA
⁸Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China

^*These authors contributed equally to this work.
^†sshevchenko@ilt.kharkov.ua
^‡iochoi@cityu.edu.hk

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Vol. 107, Iss. 19 — 15 May 2023

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