The Spectrum in Qubit-Oscillator Systems in the Ultrastrong Coupling Regime

被引：13
|
作者：
Chen Qing-Hu [1 ,2 ]
Li Lei [3 ]
Liu Tao [3 ]
Wang Ke-Lin [4 ]
机构：
[1] Zhejiang Normal Univ, Ctr Stat & Theoret Condensed Matter Phys, Jinhua 321004, Peoples R China
[2] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
[3] SW Univ Sci & Technol, Sch Sci, Mianyang 621010, Peoples R China
[4] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2012年 / 29卷 / 01期
基金：
中国国家自然科学基金;
关键词：
JAYNES-CUMMINGS MODEL; QUANTUM STATES; CIRCUIT; DYNAMICS; PHOTON;
D O I：
10.1088/0256-307X/29/1/014208
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Recent measurement on an LC resonator magnetically coupled to a superconducting qubit [Phys. Rev. Lett. 105 (2010) 237001] shows that the system operates in the ultra-strong coupling regime and crosses the limit of validity for the rotating-wave approximation of the Jaynes-Cummings model. By using extended bosonic coherent states, we solve the Jaynes-Cummings model exactly without using the rotating-wave approximation. Our numerically exact results for the spectrum of the flux qubit coupled to the LC resonator are fully consistent with the experimental observations. The smallest Bloch-Siegert shift obtained is consistent with that observed in this experiment. In addition, the Bloch-Siegert shifts in arbitrary level transitions and for arbitrary coupling constants are predicted.
引用
收藏
页数：4
相关论文
共 50 条
  • [1] Qubit-oscillator system: An analytical treatment of the ultrastrong coupling regime
    Hausinger, Johannes
    Grifoni, Milena
    PHYSICAL REVIEW A, 2010, 82 (06):
  • [2] Qubit-oscillator systems in the ultrastrong-coupling regime and their potential for preparing nonclassical states
    Ashhab, S.
    Nori, Franco
    PHYSICAL REVIEW A, 2010, 81 (04):
  • [3] Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
    Yoshihara F.
    Fuse T.
    Ashhab S.
    Kakuyanagi K.
    Saito S.
    Semba K.
    Nature Physics, 2017, 13 (1) : 44 - 47
  • [4] Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
    Yoshihara, Fumiki
    Fuse, Tomoko
    Ashhab, Sahel
    Kakuyanagi, Kosuke
    Saito, Shiro
    Semba, Kouichi
    NATURE PHYSICS, 2017, 13 (01) : 44 - 47
  • [5] Cavity-QED simulation of qubit-oscillator dynamics in the ultrastrong-coupling regime
    Grimsmo, Arne L.
    Parkins, Scott
    PHYSICAL REVIEW A, 2013, 87 (03):
  • [6] Observation of the Bloch-Siegert Shift in a Qubit-Oscillator System in the Ultrastrong Coupling Regime
    Forn-Diaz, P.
    Lisenfeld, J.
    Marcos, D.
    Garcia-Ripoll, J. J.
    Solano, E.
    Harmans, C. J. P. M.
    Mooij, J. E.
    PHYSICAL REVIEW LETTERS, 2010, 105 (23)
  • [7] Qubit-oscillator system under ultrastrong coupling and extreme driving
    Hausinger, Johannes
    Grifoni, Milena
    PHYSICAL REVIEW A, 2011, 83 (03):
  • [8] Inversion of Qubit Energy Levels in Qubit-Oscillator Circuits in the Deep-Strong-Coupling Regime
    Yoshihara, F.
    Fuse, T.
    Ao, Z.
    Ashhab, S.
    Kakuyanagi, K.
    Saito, S.
    Aoki, T.
    Koshino, K.
    Semba, K.
    PHYSICAL REVIEW LETTERS, 2018, 120 (18)
  • [9] Qubit-nonlinear-oscillator systems: from the moderate-coupling limit to the ultrastrong-coupling regime
    de los Santos-Sanchez, O.
    JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, 2018, 51 (30)
  • [10] Ladder of Loschmidt anomalies in the deep strong-coupling regime of a qubit-oscillator system
    Betancourt, J. M.
    Rodriguez, F. J.
    Quiroga, L.
    Johnson, N. F.
    PHYSICAL REVIEW A, 2021, 104 (04)
12345