Dr. Nadav Katz

University of California
Santa Barbara, CA 93106

High fidelity superconducting qubit gates

The Josephson phase qubit can be thought of as a "tunable atom" where the energy levels used as the qubit are tuned via external controls. Recently we have dramatically improved the coherence of our qubits by quantifying the various material defect decoherence pathways, and removing them via optimized fabrication. The resulting near unity fidelity achieved in single-shot measurement and control opens up many possibilities. I will show our results for quantum state tomography of one and two qubits. This includes an analysis of qubit evolution due to partial measurement, and the generation and characterization of various Bell-like states in coupled qubits.

Seminar schedule: http://www.physics.rutgers.edu/qcg/Seminars.html