Manipulating counter-rotating interactions in the quantum Rabi model via modulation of the transition frequency of the two-level system

作者：Huang, Jin-Feng^*; Liao, Jie-Qiao^*; Tian, Lin; Kuang, Le-Man

来源：Physical Review A, 2017, 96(4): 043849.

DOI：10.1103/PhysRevA.96.043849

• ULTRASTRONG-COUPLING REGIME
• SPACE QUANTIZATION

We propose a theoretical approach to manipulate the counter-rotating (CR) interactions in the quantum Rabi model by introducing a sinusoidal modulation to the transition frequency of the quantum two-level system. By choosing appropriate modulation frequency and amplitude, enhancement and suppression of the CR interactions can be achieved in the Jaynes-Cummings regime (including both weak-and strong-coupling cases) as well as the ultrastrong-coupling regime. In particular, we calculate the output excitation emission of the bosonic vacuum state under enhanced CR terms. Our results show that continuous and steady bosonic excitation emission from the bosonic vacuum can be observed in the Jaynes-Cummings regime as a consequence of the enhancement. Our approach is general and system independent, and hence it works for various physical systems described by the quantum Rabi model. As an example, we discuss the implementation of this scheme with superconducting quantum circuits.

• 出版日期2017-10-20
• 单位湖南师范大学