Inelastic microwave photon scattering off a quantum impurity in a Josephson-junction array

Moshe Goldstein*, Michel H. Devoret, Manuel Houzet, Leonid I. Glazman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

Quantum fluctuations in an anharmonic superconducting circuit enable frequency conversion of individual incoming photons. This effect, linear in the photon beam intensity, leads to ramifications for the standard input-output circuit theory. We consider an extreme case of anharmonicity in which photons scatter off a small set of weak links within a Josephson junction array. We show that this quantum impurity displays Kondo physics and evaluate the elastic and inelastic photon scattering cross sections. These cross sections reveal many-body properties of the Kondo problem that are hard to access in its traditional fermionic version.

Original languageEnglish
Article number017002
JournalPhysical Review Letters
Volume110
Issue number1
DOIs
StatePublished - 2 Jan 2013
Externally publishedYes

Funding

FundersFunder number
National Science Foundation
Directorate for Mathematical and Physical Sciences1206612
Directorate for Mathematical and Physical Sciences

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