KIT | KIT-Bibliothek | Impressum | Datenschutz

Superconducting Quantum Metamaterials

Brehm, Jan David

Abstract (englisch):

Superconducting quantum metamaterials extend the idea of their classical counterpart to a regime where their constituent meta-atoms are quantum objects, which can hold their quantum coherence for longer than the propagation time of light through the medium.
In this work, we have realized a quantum metamaterial consisting of eight individually controllable superconducting transmon qubits, which are coupled to the mode continuum of a one-dimensional coplanar waveguide. This system can be described within the framework of waveguide-quantum electrodynamics, which predicates that the mutual interaction of the qubits with the waveguide gives rise to long-range interactions of the qubits.
In spectroscopic measurements we observe the formation of super- and subradiant collective metamaterial excitations, as well as the emergence of a polaritonic band gap and study their dependence on the number of participating resonant qubits. We utilize the collective Autler-Townes splitting of the metamaterial to demonstrate control over its band gap. Furthermore, we exploit the control over the band structure for a first realization of slowly propagating light in the metamaterial. ... mehr


Volltext §
DOI: 10.5445/IR/1000130266
Veröffentlicht am 11.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Hochschulschrift
Publikationsdatum 11.03.2021
Sprache Englisch
Identifikator KITopen-ID: 1000130266
Verlag Karlsruher Institut für Technologie (KIT)
Umfang iii, 132 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Physikalisches Institut (PHI)
Prüfungsdatum 15.01.2021
Schlagwörter Supraleitung, Quantenbits, Festkörperphysik, Metamaterialien, Quantencomputing, superconductivity, quantum bits, solid state physics, metamaterials, quantum computing
Referent/Betreuer Ustinov, A. V.
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page