Information-flux approach to multiple-spin dynamics (Articolo in rivista)

Type
Label
  • Information-flux approach to multiple-spin dynamics (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Di Franco, C; Paternostro, M; Palma, GM; Kim, MS (2007)
    Information-flux approach to multiple-spin dynamics
    in Physical review. A
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Di Franco, C; Paternostro, M; Palma, GM; Kim, MS (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 76 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland; Univ Palermo, Dipartimento Sci Fisiche Astron, CNR, INFM,NEST, I-90123 Palermo, Italy (literal)
Titolo
  • Information-flux approach to multiple-spin dynamics (literal)
Abstract
  • We introduce and formalize the concept of information flux in a many-body register as the influence that the dynamics of a specific element receive from any other element of the register. By quantifying the information flux in a protocol, we can design the most appropriate initial state of the system and, noticeably, the distribution of coupling strengths among the parts of the register itself. The intuitive nature of this tool and its flexibility, which allow for easily manageable numerical approaches when analytic expressions are not straightforward, are greatly useful in interacting many-body systems such as quantum spin chains. We illustrate the use of this concept in quantum cloning and quantum state transfer and we also sketch its extension to nonunitary dynamics. (literal)
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