Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 27: Symposium: Circuit QED
TT 27.9: Vortrag
Donnerstag, 28. Februar 2008, 12:45–13:00, H 0104
Single Photon Generation in Superconducting Microwave Cavities — •Giuseppe Mangano1,2, Jens Siewert1,2, and Giuseppe Falci1 — 1MATIS CNR-INFM & DMFCI, Università di Catania, I-95125 Catania, Italy — 2Institute für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany
Circuit quantum electrodynamics (circuit QED) in superconducting nanocircuits provides a new system analogous to quantum-optical cavity QED. A particular advantage of circuit QED is the flexibility with respect to system parameters that allow to drive the setup in various regimes. Thus, it opens a playground to test in this solid-state system many effects that have been predicted in quantum optics. One particularly interesting problem is the generation and detection of non-classical cavity states such as photon number states (despite the fact that up to date there is no single-photon detector for these microwave photons). In a recent experiment, generation of single photons relied on spontaneous emission events has been demonstrated in a circuit QED architecture [1]. Here we propose an alternative method to trigger the emission of a single photon into the cavity by applying the stimulated Raman adiabatic passage (STIRAP) invoking a third level of the Cooper-pair box. The method requires a leaky cavity [2], otherwise the STIRAP protocol could not generate single photons as in circuit QED the capacitive atom-cavity coupling is fixed.
[1] A. A. Houck, et al. Nature 449, 328-331 (2007).
[2] A. Kuhn, et al. Appl. Phys B 69, 373 (1999).