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복잡계 이론물리 연구단
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Magnetically induced transparency of a quantum metamaterial composed of twin flux qubits

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Title
Magnetically induced transparency of a quantum metamaterial composed of twin flux qubits
Author(s)
K.V. Shulga; E. Il’ichev; M.V. Fistul; I.S. Besedin; S. Butz; O.V. Astafiev; U. Hübner; A.V. Ustinov
Publication Date
2018-01
Journal
NATURE COMMUNICATIONS, v.9, no.1, pp.150 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Quantum theory is expected to govern the electromagnetic properties of a quantum metamaterial, an artificially fabricated medium composed of many quantum objects acting as artificial atoms. Propagation of electromagnetic waves through such a medium is accompanied by excitations of intrinsic quantum transitions within individual meta-atoms and modes corresponding to the interactions between them. Here we demonstrate an experiment in which an array of double-loop type superconducting flux qubits is embedded into a microwave transmission line. We observe that in a broad frequency range the transmission coefficient through the metamaterial periodically depends on externally applied magnetic field. Field-controlled switching of the ground state of the meta-atoms induces a large suppression of the transmission. Moreover, the excitation of meta-atoms in the array leads to a large resonant enhancement of the transmission. We anticipate possible applications of the observed frequency-tunable transparency in superconducting quantum networks. © The Author(s) 2018
URI
http://pr.ibs.re.kr/handle/8788114/4296
ISSN
2041-1723
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
Files in This Item:
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