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SYQE: Intersectional Symposium Cavity meets Circuit Quantum Electrodynamics
SYQE 1: Cavity meets Circuit Quantum Electrodynamics
SYQE 1.4: Hauptvortrag
Freitag, 18. März 2011, 12:00–12:30, HSZ 01
Artificial atom in 1D open space — Yasunobu Nakamura1,2 and •Abdufarrukh Abdumalikov3 — 1NEC Green Innovation Research Laboratories, Tsukuba, Japan — 2RIKEN, Wako, Japan — 3ETH Zürich
Circuit QED has been beautifully demonstrated in an on-chip coplanar wave guide resonator: The large dipole moment of a superconducting qubit as an artificial atom interacts strongly with the discrete modes of the microwave resonator. An even simpler, but less commonly studied setup in quantum optics may be an atom strongly coupled with a continuum of 1D electromagnetic modes. Again, the large dipole moment and the tightly confined field in a microwave transmission line enable us to realize such a case with a dominant spontaneous emission rate of the artifical atom to the 1D mode. Thanks to the one-dimensionality, the spatial mode matching for the interference between the incident microwave and the absorbed and re-emitted microwave can be perfect, resulting in extinction of the transmission at the resonant frequency of the atom. Additionally, by using the higher exciation level of the atom, we can implement further functions such as switching and amplification of the transmitted microwave by the single atom in the transmission line. This can be a basic tool for microwave quantum optics applications.