Artículos de revistas
Entanglement entropy in long-range harmonic oscillators
Fecha
2012Registro en:
EPL, MULHOUSE, v. 100, n. 6, pp. 64-69, DEC, 2012
0295-5075
10.1209/0295-5075/100/60011
Autor
Nezhadhaghighi, M. Ghasemi
Rajabpour, M. A.
Institución
Resumen
We study the Von Neumann and Renyi entanglement entropy of long-range harmonic oscillators (LRHO) by both theoretical and numerical means. We show that the entanglement entropy in massless harmonic oscillators increases logarithmically with the sub-system size as S - c(eff)/3 log l. Although the entanglement entropy of LRHO's shares some similarities with the entanglement entropy at conformal critical points we show that the Renyi entanglement entropy presents some deviations from the expected conformal behaviour. In the massive case we demonstrate that the behaviour of the entanglement entropy with respect to the correlation length is also logarithmic as the short-range case. Copyright (c) EPLA, 2012