Quantum Isolators and Frequency Convertors

3:00 pm – 6:00 pm, Thursday March 20 // Session MAR-T09 //Anaheim Convention Center, 204C (Level 2)

Chair:: Victor Augusto Bittencourt, University of Strasbourg
Topics:
Sponsored by: DQI

Flux-Pumped Symmetrically Threaded SQUID Josephson Parametric Amplifier

5:00 pm – 5:12 pm

Presenter: KAGAN YANIK (University of Rochester)

Authors: Irwin Huang (University of Rochester), Bibek Bhandari (Chapman University), AHMED HAJR (University of California, Berkeley), Bingcheng Qing (University of California, Berkeley), Ke Wang (University of California, Berkeley), Justin Dressel (Chapman University), Irfan Siddiqi (University of California, Berkeley), Andrew Jordan (Chapman University)

Josephson parametric amplifiers (JPA) have many useful applications in superconducting qubit measurements and quantum feedback. Ideally, JPA's are supposed to perform as perfect quantum amplifiers. However, in practice their performance is limited by higher-order corrections such as Kerr nonlinearity. In our work, we design a flux-pumped symmetrically threaded SQUID (STS) JPA which allows us to eliminate the Kerr nonlinearity from the Hamiltonian. We find that this setup can yield a gain closer to the ideal Degenerate Parametric Amplifier gain compared to SQUID based flux-pumped JPA. We also investigate quadrature mixing as well as noise properties of the Kerr free amplifier.

PRESENTATIONS (13)