| Zugriffsnummer | 32816 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Flux-dependent crossover between quantum and classical behavior in a dc SQUID |
| Autor(in); Institution |
Butz, Susanne; Karlsruher Institut für Technologie (KIT), Physikalisches Institut, Karlsruhe, GERMANY
Feofanov, Alexey; Karlsruher Institut für Technologie (KIT), Physikalisches Institut, Karlsruhe, GERMANY
Fedorov, Kirill; Karlsruher Institut für Technologie (KIT), Physikalisches Institut, Karlsruhe, GERMANY
Rotzinger, Hannes; Karlsruher Institut für Technologie (KIT), Physikalisches Institut, Karlsruhe, GERMANY
Thomann, Alexander; Theoretische Physik, ETH Zürich, Zürich, SWITZERLAND
Mackrodt, Brigitte; 2.4, Quantenelektronik, PTB-Braunschweig
Dolata, Ralf; 2.4, Quantenelektronik, PTB-Braunschweig
Geshkenbein, Vadim; ETH Zürich, Theoretische Physik, Zürich, SWITZERLAND
Blatter, Gianni; ETH Zürich, Theoretische Physik, Zürich, SWITZERLAND
Ustinov, Alexey; Karlsruher Institut für Technologie (KIT), Physikalisches Institut, Karlsruhe, GERMANY
|
| Quelle/Jahr | Physical Review Letters: 113 (2014), 24, 247005-1 - 247005-5 |
| ISSN | 1079-7114 (ONLINE) ; 0031-9007 (PRINT) |
| DOI | |
| Verlag | Ridge, NY: American Physical Society |
| Klassifikationscode | PACS: 74.50.+r ; PACS: 03.65.-w ; PACS: 05.20.-y ; PACS: 85.25.Dq |
| Zusammenfassung | In a coupled system of one classical and one quantum mechanical degree of freedom, the quantum degree of freedom can facilitate the escape of the whole system. Such unusual escape characteristics have been theoretically predicted as the “Münchhausen effect”. We implement such a system by shunting one of the two junctions of a dc SQUID with an additional capacitance. In our experiments, we detect a crossover between quantum and classical escape processes related to the direction of escape. We find that, under varying external magnetic flux, macroscopic quantum tunneling periodically alternates with thermally activated escape, a hallmark of the “Münchhausen effect”. |
Zitierung
Butz, S., Feofanov, A., Fedorov, K., Rotzinger, H., Thomann, A., Mackrodt, B., Dolata, R., Geshkenbein, V., Blatter, G., & Ustinov, A. (2014). Flux-dependent crossover between quantum and classical behavior in a dc SQUID. Physical Review Letters, 113(24), 247005-1–247005-5. https://doi.org/10.1103/physrevlett.113.247005