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Optica Publishing Group
  • CLEO/Europe and IQEC 2007 Conference Digest
  • (Optica Publishing Group, 2007),
  • paper IF_7

Entangling level-crossing interaction between independent atoms

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Abstract

The study of practical schemes for creation of quantum entanglement between atoms (or ions) is the most active area in quantum optics and quantum information science. Different schemes have been proposed including atoms trapped inside a single mode cavity and trapped atoms individually interacting with focused laser light [1], In these schemes the atoms are far enough apart that the direct dipole-dipole coupling or other direct interactions between the atoms can be neglected. Here, we are concerned with atomic separations smaller than the resonant wavelength and consider two nonidentical atoms interacting with a standing-wave laser field (see Fig. 1). We assume that one of the atoms is located at an antinode and the other is located at a node of the standing wave. In this case only the atom located at the antinode of the standing wave is driven by the laser field. Moreover, the dipole-dipole potential between the atoms, averaged over all possible orientations of the dipole moments in respect to the atomic axis, vanishes at this specific separation [2], This allows to manipulate the atoms even at such small separations.

© 2007 IEEE

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