For quantum information experiments we have cooled one and two (40)Ca(+) ions to the ground state of vibration with up to 99.9% probability, using resolved sideband cooling on the optical S(1/2) - D(5/2) quadrupole transition. Implementing a novel cooling scheme based on electromagnetically induced transparency on the S(1/2) - P(1/2) manifold we have achieved simultaneous ground state cooling of two motional sidebands 1.7 MHz apart. Coherent quantum state manipulation on the S(1/2) - D(5/2) quadrupole transition at 729 nm was demonstrated and up to 30 Rabi oscillations within 1.4 ms have been observed starting from the motional ground state and from the n = 1 Fock state. In a linear rf-trap two ions were cooled to the ground state of motion and individual addressing of the ions with laser pulses is achieved.
CITATION STYLE
Leibfried, D., Roos, C., Barton, P., Rohde, H., Guide, S., Mundt, A. B., … Blatt, R. (2006). Towards Quantum Computation with Trapped Calcium Ions. In Quantum Communication, Computing, and Measurement 3 (pp. 179–187). Kluwer Academic Publishers. https://doi.org/10.1007/0-306-47114-0_29
Mendeley helps you to discover research relevant for your work.