Dresden 2006 – scientific programme
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TT: Tiefe Temperaturen
TT 32: Transport: Quantum Coherence and Quantum Information Systems - Part 2
TT 32.6: Talk
Thursday, March 30, 2006, 15:15–15:30, HSZ 304
Mesoscopic Superpositions, Nonclassical States, and their Measurement in Circuit QED — •Markus J. Storcz1, Matteo Mariantoni2, Andreas Emmert2, Rudolf Gross2, Frank K. Wilhelm1, Henning Christ3, and Enrique Solano3,4 — 1Department Physik, ASC and CeNS, Ludwig-Maximilians-Universität, Theresienstr. 37, 80333 München, Germany — 2Walther-Meissner-Institut, Walther-Meissner-Str. 8, 85748 Garching, Germany — 3Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany — 4Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Apartado 1761, Lima, Peru
We propose a novel scheme consisting of a superconducting qubit coupled to a microwave cavity with an additional transverse control line. We show that an orthogonal and strong classical driving allows for the simultaneous implementation of Jaynes-Cummings and anti-Jaynes-Cummings dynamics, opening new avenues in the generation of nonclassical states and mesoscopic superpositions (Schrödinger cats). Moreover, the proposed set-up can also be used for implementing a projective qubit measurement and for reconstructing the associated field Wigner function. Relevant decoherence aspects and specific design parameters for a superconducting charge qubit inside a coplanar waveguide resonator are presented.
This work was supported by the SFB 631 of the DFG.