Logarithmic divergence of the block entanglement entropy for the ferromagnetic Heisenberg model
Journal Article
·
· Physical Review. A
- Institut fuer Festkoerperforschung, Forschungszentrum Juelich-52425 Juelich (Germany)
Recent studies have shown that logarithmic divergence of entanglement entropy as a function of the size of a subsystem is a signature of criticality in quantum models. We demonstrate that the ground-state entanglement entropy of n sites for the ferromagnetic Heisenberg spin-(1/2) chain of the length L in a sector with fixed magnetization y per site grows as (1/2)log{sub 2}[n(L-n)/L]C(y), where C(y)=2{pi}e((1/4)-y{sup 2})
- OSTI ID:
- 20650183
- Journal Information:
- Physical Review. A, Vol. 71, Issue 1; Other Information: DOI: 10.1103/PhysRevA.71.012301; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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