A similarity of quantum phase transition and quench dynamics in the Dicke model beyond the thermodynamic limit
Li-Tuo Shen, Zhi‐Cheng Shi, Zhen‐Biao Yang, Huai‐Zhi Wu, Zhi‐Rong Zhong, Shi‐Biao Zheng · EPJ Quantum Technology · 2020
Abstract 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.