[QIP-Sem] QIP seminar, Tue 5/5, 4:00, 26-214, Girvin,Steven

[Peter Shor]

MIT Quantum Information Processing seminar
Tuesday 5/5 at 4:00 in 26-214
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 Girvin,Steven (Yale)

Demonstration of entanglement on demand and two-qubit quantum algorithms in circuit QED

Abstract:

The 'circuit QED' architecture consists of Josephson junction qubits placed inside a coplanar waveguide microwave resonator. This talk will present an introduction to the quantum optics of these novel electrical circuits and describe recent experiments in the Schoelkopf lab at Yale. With the help of a controlled phase gate based on precision control and shaping of microwave pulses, it is now possible to achieve two-qubit entanglement on demand with concurrence up to 94% and to run the Grover search and Deutsch-Josza quantum algorithms with fidelities exceeding 80%. This success is based on a qubit design with long coherence times and the ability to simultaneously readout the state of two qubits (so far still with low fidelity).

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