Yale University

Volodymyr Sivak

Michel Devoret

Shyam Shankar

Katrina Sliwa

Anirudh Narla

Nicholas Frattini

Uri Vool

A superconducting device includes two nodes and a Josephson junction coupled between the two nodes, wherein the Josephson junction is characterized by a superconducting phase difference, &#x3c6;, wherein the superconducting device has a potential that varies as a function of the superconducting phase difference, &#x3c6;, and has a single potential well. The potential has a non-zero cubic term and quartic term is zero. The Josephson junction may be a single small Josephson junction. The superconducting device may include a superconducting ring connected between the two nodes. The superconducting ring may include a first ring portion with a plurality of large Josephson junctions connected in series. The superconducting ring may also include a second ring portion that includes the single small Josephson junction in parallel with the plurality of large Josephson junctions between the two nodes.

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New Haven, CT, United States of America

Volodymyr Sivak