Accurate numerical solution to the finite-size Dicke model

Details Accurate numerical solution to the finite-size Dicke model Accurate numerical solution to the finite-size Dicke model

2008-09-25

arxiv.org/abs/0809.4385v2

Phys. Rev. A78, 051801(R)(2008)

Physics

Quantum Physics

4 pages, 5 figures. Phys. Rev. A (in press, a Rapid Communication)

Scientific paper

10.1103/PhysRevA.78.051801

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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