Rabi oscillations in a qubit coupled to a quantum two-level system

2006/02/28 by Sahel Ashhab, S. Ashhab, J. R. Johansson +1
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #cond-mat.supr-con

paper · pdf · doi:10.1088/1367-2630/8/6/103

published as New Journal of Physics 8, 103 (2006) · 8 pages (two-column), 5 figures

openalex publication_date 2006/06/16 · arxiv created 2006/07/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

We consider the problem of a qubit driven by a harmonically oscillating external field while it is coupled to a quantum two-level system (TLS). We perform a systematic numerical analysis of the problem by varying the relevant parameters. The numerical calculations agree with the predictions of a simple intuitive picture, namely one that takes into consideration the four-level energy spectrum, the simple principles of Rabi oscillations and the basic effects of decoherence. Furthermore, they reveal a number of other interesting phenomena. We provide explanations for the various features that we observe in the numerical calculations and discuss how they can be used in experiment. In particular, we suggest an experimental procedure to characterize an environment of TLSs.

Citations

• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• Demonstration of conditional gate operation using superconducting charge qubits
• Quantum-state engineering with Josephson-junction devices
• Low- and High-Frequency Noise from Coherent Two-Level Systems
• Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
• Rabi Oscillations in a Josephson-Junction Charge Two-Level System