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Tomography and Entanglement in Coupled Josephson Junction Qubits; transients to phase-locking or signatures of quantum behavior

PDE and Applied Math Seminar

Speaker: Niels Grønbech-Jensen, UC Davis
Location: 1147 MSB
Start time: Tue, Mar 15 2011, 3:10PM

Observations of quantum behavior in macroscopic systems have been reported for decades. Experiments on microwave-driven Josepshon systems have been a particularly rich source of data due to the simplicity of the Josepshon relationships and the direct physical manipulation of the devices. We review key types of experiments of anomalous resonances, Rabi-oscillations, Ramsey fringes and other related types of measurements, such as qubit entanglement. However, we take the approach of investigating the observations through nonlinear analysis of the the well-accepted, driven-damped, non-quantized Resistively and Capacitively Shunted Josephson (RCSJ) model.