Josephson junction transmission lines as tunable artificial crystals
2011 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 83, no 1, 014511- p.Article in journal (Refereed) Published
We investigate one-dimensional Josephson junction arrays with generalized unit cells, beyond a single junction or SQUID, as a circuit approach to engineer band gaps. Within a specific frequency range, of the order of the single junction plasma frequency, the dispersion relation becomes gapped and the impedance becomes purely imaginary. We derive the parameter dependence of this gap and suggest designs to lower it to microwave frequencies. The gap can be tuned in a wide frequency range by applying external flux, and persists in the presence of small imperfections. These arrays, which can be thought of as tunable artificial crystals, may find use in applications ranging filters to the protection of quantum bits.
Place, publisher, year, edition, pages
2011. Vol. 83, no 1, 014511- p.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-11552DOI: 10.1103/PhysRevB.83.014511ISI: 000286741100005ScopusID: 2-s2.0-79551566674OAI: oai:DiVA.org:kth-11552DiVA: diva2:277683
FunderSwedish Research Council
QC 20110310 Ändrad från Manuskript (preprint) till Artikel i tidskrift 201103102009-11-202009-11-192012-08-30Bibliographically approved