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Document Type: Artigo
Title: Thermal entanglement witness for materials with variable local spin lengths
Authors: Souza, André Maurício Conceição de
Almeida, Francisco A. G.
Issue Date: May-2009
Abstract: We show that the thermal entanglement in a spin system using only magnetic-susceptibility measurements is restricted to the insulator materials. We develop a generalization of the thermal entanglement witness that allows us to get information about the system entanglement with variable local spin lengths that can be used experimentally in conductor or insulator materials. As an application, we study thermal entanglement for the half-filled Hubbard model for linear, square, and cubic clusters. We note that it is the itinerancy of electrons that favors the entanglement. Our results suggest a weak dependence between entanglement and external spin freedom degrees.
Keywords: Termodinâmica
Modelo de Hubbard
ISSN: 1094-1622
Publisher / Institution : American Physical Society
Citation: SOUZA, A. M. C.; ALMEIDA, F. A. G. Thermal entanglement witness for materials with variable local spin lengths. Physical Review A, New York, v. 79, n. 5, maio 2009. Disponível em: <>. Acesso em: 18 abr. 2013.
License: © 2009 The American Physical Society
Appears in Collections:DFI - Artigos de periódicos

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