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Memory coherence of a sympathetically cooled trapped-ion qubit

Abstract:

We demonstrate sympathetic cooling of a 43Ca+ trapped-ion "memory" qubit by a 40Ca+ "coolant" ion sufficiently near the ground state of motion for fault-tolerant quantum logic, while maintaining coherence of the qubit. This is an essential ingredient in trapped-ion quantum computers. The isotope shifts are sufficient to suppress decoherence and phase shifts of the memory qubit due to the cooling light which illuminates both ions. We measure the qubit coherence during ten cycles of sideband co...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1103/PhysRevA.79.050305

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Institution:
University of Oxford
Research group:
Ion Trap Quantum Computing Group
Department:
Mathematical,Physical & Life Sciences Division - Physics - Atomic & Laser Physics
More by this author
Institution:
University of Oxford
Research group:
Ion Trap Quantum Computing Group
Department:
Mathematical,Physical & Life Sciences Division - Physics - Atomic & Laser Physics
More by this author
Institution:
University of Oxford
Research group:
Ion Trap Quantum Computing Group
Department:
Mathematical,Physical & Life Sciences Division - Physics - Atomic & Laser Physics
More by this author
Institution:
University of Oxford
Research group:
Ion Trap Quantum Computing Group
Department:
Mathematical,Physical & Life Sciences Division - Physics - Atomic & Laser Physics
More by this author
Institution:
University of Oxford
Research group:
Ion Trap Quantum Computing Group
Department:
Mathematical,Physical & Life Sciences Division - Physics - Atomic & Laser Physics
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More from this funder
Funding agency for:
D. M. Lucas
More from this funder
Grant:
W911NF-05-1-0297
Engineering and Physical Sciences Research Council More from this funder
European Commission More from this funder
Royal Society More from this funder
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review A Journal website
Volume:
79
Issue:
5
Pages:
Article: 050305(R)
Publication date:
2009-05-05
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
URN:
uuid:5c076f1a-52a2-4c22-a4f4-04ac5530be61
Local pid:
ora:2867
Language:
English
Subjects:

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