Engineering giant nonlinearities in quantum nanosystems.
We describe a method to engineer giant nonlinearities in, and probes to measure nonlinear observables of, mesoscopic quantum resonators. This involves tailoring the Hamiltonian of a simple auxiliary system perturbatively coupled to the resonator, and has the potential to engineer a wide range of nonlinearities to high accuracy. We give a number of explicit examples, including a readily realizable two-qubit auxiliary system that creates an x;{4} potential and a chi;{(3)} (Kerr) nonlinearity, valid to fifth order in the perturbative coupling.
Department of Physics, University of Massachusetts at Boston, Boston, Massachusetts 02125, USA.
Kurt
K
Jacobs
Andrew J
AJ
Landahl