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Phys Rev Lett. 2004 Sep 24;93(13):130503. Epub 2004 Sep 23.

Demonstration of conditional quantum phase shift between ions in a solid.

Author information

  • 1Laser Physics Center, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia. jevon.longdell@anu.edu.au

Abstract

Because of their long coherence times, dopant ions have been considered promising candidates for scalable solid state quantum computing. Here we demonstrate a conditional phase shift between two qubits based on an optical transition of europium ions. The demonstration uses ensembles that have been selected from a randomly doped sample using spectral hole burning techniques. The electron dipole-dipole interaction between the ions that usually causes instantaneous spectral diffusion is used to generate the conditional phase shift.

PMID:
15524694
[PubMed]
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