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Critical Property of the Geometric Phase in the Dicke Model with the Dipole-dipole Interactions

Yunfeng WU , Ping ZHANG

材料科学技术(英文)

We obtained the ground-state energy level and associated geometric phase in the Dicke model with the dipole-dipole interactions analytically by the Holstein-Primakoff transformation and the boson expansion approach in the thermodynamic limit. The nonadiabatic geometric phase induced by the photon field was derived with the time-dependent unitary transformation. It is shown that dipole-dipole interactions have a deep influence on scaled behavior of the geometric phase at the critical point.

关键词: Geometric phases , null , null

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