Quantum control, quantum information processing, and quantum-limited   metrology with trapped ions
  We briefly discuss recent experiments on quantum information processing using trapped ions at NIST. A central theme of this work has been to increase our capabilities in terms of quantum computing protocols, but we have also applied the same concepts to improved metrology, particularly in the area of frequency standards and atomic clocks. Such work may eventually shed light on more fundamental issues, such as the quantum measurement problem. 
D. J. Wineland, D. Leibfried, M. D. Barrett, A. Ben-Kish, J. C.   Bergquist, R. B. Blakestad, J. J. Bollinger, J. Britton, J...