2006/09/30 by Ya. S. Greenberg · 37 citations
Computer Science · Physics and Astronomy · #Amplitude #Atomic physics #Condensed matter physics #Dissipative system #Excitation #Flux qubit #Hamiltonian (control theory) #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Rabi cycle #Rabi frequency #Spectroscopy and Quantum Chemical Studies #Spins #cond-mat.mes-hall #cond-mat.soft
paper · pdf · doi:10.1103/physrevb.76.104520
published in Physical Review B 76(10) (American Physical Society) · In this version the Introduction, the NMR application part and some text are modified, several new references are added. Some unimportant calculations are removed. Several typos are corrected
arxiv created 2007/08/20 · openalex publication_date 2007/09/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have analyzed a dissipative two-level quantum system (TLS) which is continuously and simultaneously irradiated by high- and low-frequency excitation. The interaction of the TLS with a high-frequency excitation is considered in the frame of the dressed-state approach. A linear response of the coupled TLS and corresponding photon field system to a signal whose frequency is of the order of the Rabi frequency is found. The response exhibits undamped low-frequency oscillations whose amplitude has a clear resonance at the Rabi frequency with the width being dependent on the damping rates of the TLS. The method can be useful for low-frequency Rabi spectroscopy in various physical systems described by a two-level Hamiltonian, such as nuclei spins in NMR, double well quantum dots, superconducting flux, charge qubits, etc. The application of the method to a superconducting flux qubit and to the detection of NMR is considered in detail.