Two-Site Holstein Model: a Variational Wavefunction Analysis

Chin. Phys. Lett.

2005, Vol. 22

Issue (11): 2914-2917 DOI:

Original Articles

Two-Site Holstein Model: a Variational Wavefunction Analysis

REN Qing-Bao^1,2;CHEN Qing-Hu²

¹Department of Physics, Lishui University, Lishui 323000 ²Department of Physics, Zhejiang University, Hangzhou 310027

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REN Qing-Bao, CHEN Qing-Hu 2005 Chin. Phys. Lett. 22 2914-2917

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Abstract A novel variational approach is proposed to calculate the ground-state (GS) properties of the two-site Holstein model. By the linear superposition of two coherent states, which simulate the behaviour of the weak and strong coupling limits, we can obtain very accurate GS energy for arbitrary electron--phonon coupling constant. Other GS properties are also discussed. Moreover, the present concise approach is hopefully generalized to many other Holstein models.

Keywords: 71.38.-k 74.20.Mn 63.20.Kr

Published: 01 November 2005

PACS:	71.38.-k	(Polarons and electron-phonon interactions)
	74.20.Mn	(Nonconventional mechanisms)
	63.20.Kr

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2005/V22/I11/02914

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