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arXiv · 0809.4385

Accurate numerical solution to the finite-size Dicke model

Qing-Hu Chen·Yu-Yu Zhang·Tao Liu·Ke-Lin Wang
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Abstract

By using extended bosonic coherent states, a new technique to solve the Dicke model exactly is proposed in the numerical sense. The accessible system size is two orders of magnitude higher than that reported in literature. Finite-size scaling for several observables, such as the ground-state energy, Berry phase, and concurrence are analyzed. The existing discrepancy for the scaling exponent of the concurrence is reconciled.

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Qing-Hu Chen, Yu-Yu Zhang, Tao Liu, Ke-Lin Wang. 2008-09-25. Accurate numerical solution to the finite-size Dicke model. https://doi.org/10.1103/physreva.78.051801

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