https://doi.org/10.1140/epjqt/s40507-019-0077-8
Research
A similarity of quantum phase transition and quench dynamics in the Dicke model beyond the thermodynamic limit
Fujian Key Laboratory of Quantum Information and Quantum Optics, College of Physics and Information Engineering, Fuzhou University, Fuzhou, China
* e-mail: sbzheng11@163.com
Received:
10
November
2019
Accepted:
23
December
2019
Published online:
6
January
2020
We study the quantum phase transition in the Dicke model beyond the thermodynamic limit. With the Kibble–Zurek mechanism and adiabatic dynamics, we find that the residual energy is inversely proportional to the number of qubits, indicating that more qubits can obtain more energies from the oscillator as the number of qubits increases. Finally, we put forward a promising experiment device to realize this system.
PACS: Codes – 05.30.Rt / Codes – 03.75.Kk / Codes – 32.80.Qk
Key words: Quantum phase transition / Quench dynamics / Dicke model / Kibble–Zurek mechanism / Thermodynamic limit
© The Author(s), 2020
