Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.203001
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Funding
- U.S. Army Research Office
- DARPA OLE program, IARPA
- MURI program
- NSF PIF Program
- NSF Physics Frontier Center at JQI
- European Commission AQUTE program
- Direct For Mathematical & Physical Scien
- Division Of Physics [0903945, 822671] Funding Source: National Science Foundation
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We report entanglement of a single atom's hyperfine spin state with its motional state in a time scale of less than 3 ns. We engineer a short train of intense laser pulses to impart a spin-dependent momentum transfer of +/- 2hk. Using pairs of momentum kicks, we create an atomic interferometer and demonstrate collapse and revival of spin coherence as the motional wave packet is split and recombined. The revival after a pair of kicks occurs only when the second kick is delayed by an integer multiple of the harmonic trap period, a signature of entanglement and disentanglement of the spin with the motion. Such quantum control opens a new regime of ultrafast entanglement in atomic qubits.
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