4 papers
Speed of ion trap quantum information processors
A. Steane, C. F. Roos, D. Stevens +4
We investigate theoretically the speed limit of quantum gate operations for ion trap quantum information processors. The proposed methods use laser pulses for quantum gates which e…
Search for correlation effects in linear chains of trapped ions
C. J. S. Donald, D. M. Lucas, P. A. Barton +5
We report a precise search for correlation effects in linear chains of 2 and 3 trapped Ca+ ions. Unexplained correlations in photon emission times within a linear chain of trapped…
Precision Measurement of the Lifetime of the 3d D_{5/2} state in 40Ca+
P. A. Barton, C. J. S. Donald, D. M. Lucas +3
We report a measurement of the lifetime of the 3d 2D_{5/2} metastable level in 40Ca+, using quantum jumps of a single cold calcium ion in a linear Paul trap. The 4s S_{1/2} - 3d D_…
Simple experimental methods for trapped ion quantum processors
D. Stevens, J. Brochard, A. M. Steane
Two techniques are described that simplify the experimental requirements for measuring and manipulating quantum information stored in trapped ions. The first is a new technique usi…