Long-Lived Mesoscopic Entanglement outside the Lamb-Dicke Regime

2006/05/31 by M. J. McDonnell, J. P. Home, Jonathan Home +12 · 3 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physrevlett.98.063603

published as Phys. Rev. Lett., v98, 063603 (2007) · 5 pages, 3 figures. Revised version after editor comments

arxiv created 2006/11/02 · openalex publication_date 2007/02/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 Deltaalpha=5.1 with coherence time 170 micros and mean phonon excitation n = 16.

Citations

• Scalable multi-particle entanglement of trapped ions

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