Details

Autor(en) / Beteiligte

• Shulga, K. V.
• Il’ichev, E.
• Fistul, M. V.
• Besedin, I. S.
• Butz, S.
• Astafiev, O. V.
• Hübner, U.
• Ustinov, A. V.

Titel

Magnetically induced transparency of a quantum metamaterial composed of twin flux qubits

Ist Teil von

• Nature communications, 2018-01, Vol.9 (1), p.150-150, Article 150

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. Here, the authors demonstrate an array of superconducting qubits embedded into a microwave transmission line. They show that the transmission through the metamaterial periodically depends on externally applied magnetic field and suppression of the transmission is achieved through field-induced transitions.