| Zugriffsnummer | 23936 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Superconducting phase qubit based on the Josephson oscillator with strong anharmonicity |
| Autor(in); Institution |
Zorin, Alexander B.; 2.4, Quantenelektronik, PTB-Braunschweig
Chiarello, Fabio; Istituto di Fotonica e Nanotecnologie, CNR, Rome, ITALY
|
| Quelle/Jahr | Physical Review B: 80 (2009), 21, 214535-1 - 214535-5 |
| ISSN | 1098-0121 |
| DOI | |
| Verlag | Ridge, NY: The American Physical Society |
| Klassifikationscode | PACS: 03.67.Lx ; PACS: 74.50.+r ; PACS: 85.25.Dq ; PACS: 03.67.Pp |
| Zusammenfassung | We propose a superconducting phase qubit on the basis of the radio-frequency SQUID with the screening parameter value βL ≡ (2π/Φ0)LIc ≈ 1, biased by a half flux quantum Φe = Φ0/2. Significant anharmonicity () 30%) can be achieved in this system due to the interplay of the cosine Josephson potential and the parabolic magnetic-energy potential that ultimately leads to the quartic polynomial shape of the well. The two lowest eigenstates in this global minimum perfectly suit for the qubit which is insensitive to the charge variable, biased in the optimal point and allows an efficient dispersive readout. Moreover, the transition frequency in this qubit can be tuned within an appreciable range allowing variable qubit-qubit coupling. |
