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Long-lived mesoscopic entanglement outside the Lamb-Dicke regime

Abstract:
We create entangled states of the spin and motion of a single 40Ca+ ion in a linear ion trap. We theoretically study and experimentally observe the behavior outside the Lamb-Dicke regime, where the trajectory in phase space is modified and the motional coherent states become squeezed. We directly observe the modification of the return time of the trajectory, and infer the squeezing. The mesoscopic entanglement is observed up to Δα = 5.1 with coherence time 170 μs and mean phenon excitation n = 16.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevLett.98.063603

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Research group:
Ion Trap Quantum Computing Group
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Research group:
Ion Trap Quantum Computing Group
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Research group:
Ion Trap Quantum Computing Group
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Research group:
Ion Trap Quantum Computing Group
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Research group:
Ion Trap Quantum Computing Group
Role:
Author
Expand authors...
Engineering and Physical Sciences Research Council More from this funder
European Union More from this funder
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National Security Agency More from this funder
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review Letters Journal website
Volume:
98
Issue:
6
Article number:
063603
Publication date:
2007-02-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Subjects:
UUID:
uuid:bac647cc-0557-40e1-9488-971bc751ca6a
Local pid:
ora:2870
Deposit date:
2009-08-17

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