Information-flux approach to multiple-spin dynamics

C. Di Franco, Mauro Paternostro, Massimo Palma, Myungshik Kim

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

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.
Original languageEnglish
Article number042316
Pages (from-to)042316-042317
Number of pages2
JournalPhysical Review A
Volume76
Issue number4
DOIs
Publication statusPublished - 10 Oct 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

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