Lev Bishop, University of Maryland
Abstract
Circuit Quantum Electrodynamics (QED) gives an implementation of cavity QED where the parameters are quite extreme compared to what is typically available in other settings. In particular the atom-cavity coupling strengths can be hundreds of linewidths, and there is no technical obstacle to applying strong driving tones that, in the absence of the atom-induced nonlinearity, would result in thousands of photons in the system. This makes circuit QED especially interesting for observing various quantum optical effects that are hard to see elsewhere, such as photon blockade and unusual nonlinear oscillator effects due to the diminishing anharmonicity of the Jaynes-Cummings Hamiltonian. These effects can also be useful for quantum computation purposes, for example by providing high-fidelity readout mechanisms.