2010/07/31 by Kathrin Henschel, Johannes Majer, Jörg Schmiedmayer +1
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Quantum optics and atomic interactions #quant-ph
paper · pdf · doi:10.1103/physreva.82.033810
published as Phys. Rev. A 82, 033810 (2010) · 20 pages, 18 figures
arxiv created 2010/09/02 · openalex publication_date 2010/09/13 · arxiv updated 2011/01/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the nonlinear dynamics of an ensemble of cold trapped atoms with a hyperfine transition magnetically coupled to a resonant microwave cavity mode. Despite the minute single-atom coupling, one obtains strong coupling between collective hyperfine qubits and microwave photons, enabling coherent transfer of an excitation between the long-lived atomic qubit state and the mode. Evidence of strong coupling can be obtained from the cavity transmission spectrum even at finite thermal photon number. The system makes it possible to study further prominent collective phenomena such as superradiant decay of an inverted ensemble or the building of a narrowband stripline micromaser locked to an atomic hyperfine transition.