Josephson Metamaterial with a widely tunable positive/negative Kerr constant

Autor:	Zhang, Wenyuan, Huang, W., Gershenson, M. E., Bell, M. T.
Rok vydání:	2017
Předmět:	Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. Applied 8, 051001 (2017)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevApplied.8.051001
Popis:	We report on the microwave characterization of a novel one-dimensional Josephson metamaterial composed of a chain of asymmetric superconducting quantum interference devices (SQUIDs) with nearest-neighbor coupling through common Josephson junctions. This metamaterial demonstrates a strong Kerr nonlinearity, with a Kerr constant tunable over a wide range, from positive to negative values, by a magnetic flux threading the SQUIDs. The experimental results are in good agreement with the theory of nonlinear effects in Josephson chains. The metamaterial is very promising as an active medium for Josephson traveling-wave parametric amplifiers; its use facilitates phase matching in a four-wave mixing process for efficient parametric gain. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1707.06834 Zobrazit plný text záznamu View this record from Arxiv