arXiv:cond-mat/0501282 Abstract

arXiv:cond-mat/0501282Abstract References Reviews Resources

Finite-size scaling exponents and entanglement in the two-level BCS model

Published 2005-01-12, updated 2005-06-21Version 2

We analyze the finite-size properties of the two-level BCS model. Using the continuous unitary transformation technique, we show that nontrivial scaling exponents arise at the quantum critical point for various observables such as the magnetization or the spin-spin correlation functions. We also discuss the entanglement properties of the ground state through the concurrence which appears to be singular at the transition.

Comments: 4 pages, 3 figures, published version

Journal: Phys. Rev. A 71, 060304 (2005)

DOI: 10.1103/PhysRevA.71.060304

Categories: cond-mat.stat-mech, nucl-th, quant-ph

Subjects: 73.43.Nq, 03.67.Mn, 05.10.Cc, 75.40.Cx

Keywords: two-level bcs model, finite-size scaling exponents, entanglement, continuous unitary transformation technique, spin-spin correlation functions

Tags: journal article

Related articles: Most relevant | Search more

arXiv:cond-mat/0503240 (Published 2005-03-10, updated 2005-07-15)

Finite-size scaling exponents in the interacting boson model

S. Dusuel, J. Vidal, J. M. Arias, J. Dukelsky, J. E. Garcia-Ramos

arXiv:cond-mat/0408624 (Published 2004-08-30, updated 2004-12-01)

Finite-Size Scaling Exponents of the Lipkin-Meshkov-Glick Model

S. Dusuel, J. Vidal

arXiv:cond-mat/0412127 (Published 2004-12-06, updated 2005-06-27)

Continuous unitary transformations and finite-size scaling exponents in the Lipkin-Meshkov-Glick model

S. Dusuel, J. Vidal

arXiv Analytics