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Dynamics of Entanglement in One-Dimensional Spin Systems | L. Amico
; A. Osterloh
; F. Plastina
; R. Fazio
; G. M. Palma
; | Date: |
7 Jul 2003 | Journal: | Phys. Rev. A. 69, 022304 (2004). | Subject: | Quantum Physics; Strongly Correlated Electrons | quant-ph cond-mat.str-el | Abstract: | We study the dynamics of quantum correlations in a class of exactly solvable Ising-type models. We analyze in particular the time evolution of initial Bell states created in a fully polarized background and on the ground state. We find that the pairwise entanglement propagates with a velocity proportional to the reduced interaction for all the four Bell states. Singlet-like states are favored during the propagation, in the sense that triplet-like states change their character during the propagation under certain circumstances. Characteristic for the anisotropic models is the instantaneous creation of pairwise entanglement from a fully polarized state; furthermore, the propagation of pairwise entanglement is suppressed in favor of a creation of different types of entanglement. The ``entanglement wave’’ evolving from a Bell state on the ground state turns out to be very localized in space-time. Further support to a recently formulated conjecture on entanglement sharing is given. | Source: | arXiv, quant-ph/0307048 | Services: | Forum | Review | PDF | Favorites |
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