Solid State Quantum Information

Generating and Characterizing Entangled Qubit States in Circuit Quantum Electrodynamics (QED)

speaker: Andreas Wallraff (ETH Zurich)

abstract: In our lab, we control the interaction of photons and qubits on the level of individual quanta 1,2 to perform novel quantum optics 3 and quantum information processing experiments 4 using superconducting electronic circuits. Here, I will discuss a new experimental approach to generate entanglement between any pair of remote qubits in a multi-qubit circuit QED system using side-band transitions 5 through a joint quantum bus 6. The resulting two-qubit entangled states are characterized using a new approach to two-qubit state tomography specific to circuit QED implementations.

1 A. Blais et al., Phys. Rev. A 69, 062320 (2004) 2 A. Wallraff et al., Nature (London) 431, 162 (2004) 3 J. Fink et al., Nature (London) 454, 315 (2008) 4 P. Leek et al., Science 318, 1889 (2007) 5 A. Wallraff et al., Phys. Rev. Lett. 99, 050501 (2007) 6 J. Majer et al., Nature (London) 449, 443 (2007)

timetable:
Wed 3 Dec, 14:30 - 15:00, Sala Stemmi
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