Phys. Rev. Lett. 93, 130503 (2004) [4 pages]Demonstration of Conditional Quantum Phase Shift Between Ions in a SolidReceived 25 April 2004; published 23 September 2004 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.130503
DOI:
10.1103/PhysRevLett.93.130503
PACS:
03.67.Lx, 78.90.+t, 82.53.Kp
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