| Zugriffsnummer | 18449 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Tunable flux qubits controlled by rapid single flux quantum logic: considerations and perspectives |
| Autor(in); Institution |
Chiarello, Fabio; Istituto di Fotonica e Nanotecnologie - CNR, Roma, ITALY
Carelli, Pasquale; Universit.aacute. dell'Aquila, L'Aquila, ITALY
Castellano, Maria Gabriella; Istituto di Fotonica e Nanotecnologie - CNR, Roma, ITALY
Cosmelli, Carlo; Universit.aacute. di Roma La Sapienza, Roma, ITALY
Khabipov, Marat I.; 2.4, Quantenelektronik, PTB-Braunschweig
Leoni, Roberto; Istituto di Fotonica e Nanotecnologie - CNR, Roma, ITALY
Torrioli, Guidp; Istituto di Fotonica e Nanotecnologie - CNR, Roma, ITALY
Zorin, Alexander B.; 2.4, Quantenelektronik, PTB-Braunschweig
|
| Quelle/Jahr | 10th International Superconductive Electronics Conference: Extended Abstracts:(2005), P-C.04 |
| Herausgeber(in) |
Rogalla, Horst; University of Twente, Low Temperature Division, Twente, THE NETHERLANDS
|
| Verlag | Twente: University of Twente, Low Temperature Division |
| Konferenzangaben | International Superconductive Electronics Conference (ISEC 2005), Noordwijkerhout, 5-9, September, 2005, The Netherlands |
| Zusammenfassung | A double-SQUID can implement an effective tunable flux qubit, completely controllable both by microwave and dc flux pulses. In principle, an ideal way for the manipulation of qubits of this kind consists in the use of Rapid Single Flux Quantum (RSFQ) logic, which can be integrated near the quantum elements allowing fast, efficient and simple control of a lot of qubits. The correct coupling between RSFQ logic and qubits presents some problems; in particular, the rapidity of SFQ transitions can induce non-adiabatic escapes outside the computational states, and the shunting resistances, necessary for the RSFQ logic operation, can introduce an intolerable decoherence contribution for the qubits dynamics. It is therefore necessary the development of an appropriate interface between RSFQ and qubits, and possible modifications of both in order to achieve this aim. In this direction, one can introduce a filtered superconducting transformer to transmit the SFQ control signal to the qubit with appropriate characteristics. Moreover, the design of the double-SQUID qubit can be modified by interrupting the large superconducting loop with an additional Jospehson junction in order to enhance the separation between computational and non-computational states. We present the subject and discuss possible schemes. |
Zitierung
Chiarello, F., Carelli, P., Castellano, M. G., Cosmelli, C., Khabipov, M. I., Leoni, R., Torrioli, G., & Zorin, A. B. (2005). Tunable flux qubits controlled by rapid single flux quantum logic: considerations and perspectives. International Superconductive Electronics Conference (ISEC 2005), Noordwijkerhout, 5-9, September, 2005, The Netherlands.