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Tunable spin-spin interactions and entanglement of ions in separate potential wells.
Wilson, A C; Colombe, Y; Brown, K R; Knill, E; Leibfried, D; Wineland, D J.
Afiliação
  • Wilson AC; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Colombe Y; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Brown KR; Georgia Tech Research Institute, 400 10th Street Northwest, Atlanta, Georgia 30332, USA.
  • Knill E; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Leibfried D; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Wineland DJ; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
Nature ; 512(7512): 57-60, 2014 Aug 07.
Article em En | MEDLINE | ID: mdl-25100480
ABSTRACT
Quantum simulation--the use of one quantum system to simulate a less controllable one--may provide an understanding of the many quantum systems which cannot be modelled using classical computers. Considerable progress in control and manipulation has been achieved for various quantum systems, but one of the remaining challenges is the implementation of scalable devices. In this regard, individual ions trapped in separate tunable potential wells are promising. Here we implement the basic features of this approach and demonstrate deterministic tuning of the Coulomb interaction between two ions, independently controlling their local wells. The scheme is suitable for emulating a range of spin-spin interactions, but to characterize the performance of our set-up we select one that entangles the internal states of the two ions with a fidelity of 0.82(1) (the digit in parentheses shows the standard error of the mean). Extension of this building block to a two-dimensional network, which is possible using ion-trap microfabrication processes, may provide a new quantum simulator architecture with broad flexibility in designing and scaling the arrangement of ions and their mutual interactions. To perform useful quantum simulations, including those of condensed-matter phenomena such as the fractional quantum Hall effect, an array of tens of ions might be sufficient.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nature Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nature Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Estados Unidos