Superconducting circuit is one of the promising candidates in the race of building a quantum computer. For such quantum computers to realize computations beyond the reach of classical ones, it is necessary to have advanced tools of controlling, coupling, and reading out qubits. In this talk, I will present my PhD work that focused on such explorations in superconducting circuits. We seek to expand the already flexible toolkit of quantum circuits by exploring the uses of parametric couplings based on third-order nonlinearities, which have previously been confined to use in quantum-limited amplifiers to create new methods of controlling and measuring quantum bits. I will talk about the results of two experiments. In the first one we address the problem of implementing an efficient, quantum non-demolition qubit readout using two-mode squeezed light readout. In the second experiment, we create an engineered bath for a transmon qubit with a parametrically system-bath coupling. I will also briefly discuss some ideas about the experiments we are going to work on in the test bed.
This talk is intended for local QIS researchers at the University of Illinois; please do not share it more broadly. The link will be sent to the IQUIST mailing lists before the seminar.
