Prof. Aashish Clerk, University of Chicago

Leuchs-Russell Auditorium, A.1.500, Staudtstr. 2
Location details

Abstract:

Interacting driven-dissipative quantum resonators are at the forefront of research in quantum optics and quantum computing with superconducting circuits.  We develop a new theoretical approach that allows one to non-perturbatively find the steady states of such systems, including nonlinear driving and dissipation.  Our method reveals a wealth of previously unexplored observable phenomena.  This includes a new kind of generalized photon blockade effect, where interference causes a sharp cut-off in the system’s photon-number distribution, even for extremely weak nonlinearity.  We also describe a new kind of quantum bistability in these systems that arises from the co-existence of “blockade” and “anti-blockade” phenomena.  The effects we describe are well within the reach of current experiments in circuit QED, and could be harnessed for a variety of applications in quantum information processing.