2007/10/10 by O. V. Zhirov, Dima L. Shepelyansky, D. L. Shepelyansky · 100 citations
Computer Science · Physics and Astronomy · #Bistability #Charge qubit #Dissipative system #Flux qubit #Laser #Lasing threshold #Mechanical and Optical Resonators #Metastability #Phase qubit #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Synchronization (alternating current) #Topology (electrical circuits) #cond-mat.other #cond-mat.supr-con #nlin.CD #quant-ph
paper · pdf · doi:10.1103/physrevlett.100.014101
published in Physical Review Letters 100(1), 014101 (American Physical Society) · revtex 4 pages, 6 figs, research at http://www.quantware.ups-tlse.fr/
arxiv created 2007/10/10 · openalex publication_date 2008/01/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study numerically the behavior of a qubit coupled to a quantum dissipative driven oscillator (resonator). Above a critical coupling strength the qubit rotations become synchronized with the oscillator phase. In the synchronized regime, at certain parameters, the qubit exhibits tunneling between two orientations with a macroscopic change of the number of photons in the resonator. The lifetimes in these metastable states can be enormously large. The synchronization leads to a drastic change of qubit radiation spectrum with the appearance of narrow lines corresponding to recently observed single artificial-atom lasing [O. Astafiev, Nature (London) 449, 588 (2007)].