Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 32: Transport: Quantum Coherence and Quantum Information Systems - Part 2

TT 32.4: Vortrag

Donnerstag, 30. März 2006, 14:45–15:00, HSZ 304

On-chip Quantum Information Processing in Circuit QED — •Henning Christ¹, Matteo Mariantoni², and Enrique Solano^1,3 — ¹Max-Planck Institute for Quantum Optics, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany — ²Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Strasse 8, D-85748 Garching, Germany — ³Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Apartado 1761, Lima, Peru

We consider an on-chip linear array of flux-based qubits inside individual quasi-1D superconductive resonators and introduce, in the context of quantum information theory, different possibilities of realizing quantum computation with suitably designed long-lived qubits. In particular, we present in a comparative manner the advantages and disadvantages of establishing on-chip quantum communication protocols via single photon exchange or via novel continuous-variable schemes. For the purpose, the latter turn out to be the most promising avenue given that single-photon detectors are still unavailable in the microwave domain. Finally, we propose a deterministic single-qubit teleportation protocol based on unitary generation of qubit-cavity Schrödinger cats, where no single-photon detector is needed.