| Issue |
EPL
Volume 106, Number 5, June 2014
|
|
|---|---|---|
| Article Number | 54001 | |
| Number of page(s) | 6 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/106/54001 | |
| Published online | 30 May 2014 | |
Solutions to the quantum Rabi model with two equivalent qubits
1 Department of Physics, Zhejiang University - Hangzhou 310027, PRC
2 Center for Statistical and Theoretical Condensed Matter Physics, Zhejiang Normal University - Jinhua 321004, PRC
3 Division of Materials Science, Nanyang Technological University - 50 Nanyang Avenue, Singapore 639798
Received: 18 March 2014
Accepted: 9 May 2014
Using extended coherent states, an analytically exact study has been carried out for the quantum Rabi model with two equivalent qubits. Compact transcendental functions of one variable have been derived leading to exact solutions. The energy spectrum is clearly identified and analyzed. Also obtained analytically are the necessary and sufficient conditions for the occurrence of isolated exceptional solutions, which are not doubly degenerate as in the one-qubit quantum Rabi model.
PACS: 42.50.Pq – Cavity quantum electrodynamics; micromasers / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 03.65.Ge – Solutions of wave equations: bound states
© EPLA, 2014
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