Finite-size scaling exponents in the interacting boson model

Details Finite-size scaling exponents in the interacting boson model Finite-size scaling exponents in the interacting boson model

2005-03-10

arxiv.org/abs/cond-mat/0503240v2

Phys. Rev. C 72, 011301 (2005)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures, published version

Scientific paper

10.1103/PhysRevC.72.011301

We investigate the finite-size scaling exponents for the critical point at the shape phase transition from U(5) (spherical) to O(6) (deformed $\gamma$-unstable) dynamical symmetries of the Interacting Boson Model, making use of the Holstein-Primakoff boson expansion and the continuous unitary transformation technique. We compute exactly the leading order correction to the ground state energy, the gap, the expectation value of the $d$-boson number in the ground state and the $E2$ transition probability from the ground state to the first excited state, and determine the corresponding finite-size scaling exponents.

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