2011/12/31 by R. Gerritsma, Antonio Negretti, A. Negretti +7 · 1 citation
Computer Science · Physics and Astronomy · #Advanced Frequency and Time Standards #Atom (system on chip) #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Ion #Josephson effect #Materials science #Measure (data warehouse) #Mesoscopic physics #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Quantum tunnelling #Scattering #Superconductivity #Trapping #quant-ph
paper · pdf · doi:10.1103/physrevlett.109.080402
6 pages and 5 figures, including additional material. Accepted for publication in Phys. Rev. Lett
arxiv created 2012/07/25 · openalex publication_date 2012/08/22 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We theoretically investigate the properties of a double-well bosonic Josephson junction coupled to a single trapped ion. We find that the coupling between the wells can be controlled by the internal state of the ion, which can be used for studying mesoscopic entanglement between the two systems and to measure their interaction with high precision. As a particular example we consider a single 87Rb atom and a small Bose-Einstein condensate controlled by a single 171Yb+ ion. We calculate interwell coupling rates reaching hundreds of Hz, while the state dependence amounts to tens of Hz for plausible values of the currently unknown s-wave scattering length between the atom and the ion. The analysis shows that it is possible to induce either the self-trapping or the tunneling regime, depending on the internal state of the ion. This enables the generation of large scale ion-atomic wave packet entanglement within current technology.