MIDIT OFD CATS Modelling, Nonlinear Dynamics Optics and Fluid Dynamics Chaos and Turbulence Studies and Irreversible Thermodynamics Risø National Laboratory Niels Bohr Institute and Technical University of Denmark Building 128 Department of Chemistry Building 321 P.O. Box 49 University of Copenhagen DK-2800 Lyngby DK-4000 Roskilde DK-2100 Copenhagen Ø Denmark Denmark Denmark

**V.V. Ryazanov**

Institute of Solid State Physics,

Russian Academy of Science,

Chernogolovka, Moscow district, 142432,

Russia

**Thursday, August 23, 2001, 14:00 h
at IMM, Bldg. 305, Room 018, DTU**

`Self-frustrated' superconducting networks with pi-junctions may be used for the realization of the superconducting quantum bit. Originally, the suggested superconducting `phase' qubits were based on magnetic-frustrated superconducting networks [2]. This system is not isolated from environment and is estimated to have shorter coherence time with respect to qubits using a pi-junction [3]. Another possible application of pi-junctions are related to the development of superconducting `complementary' electronics [4] based on the analogy to complementary metal-oxide-semiconductor (CMOS) logic family.

REFERENCES:

[1] V.V.Ryazanov, V.A.Oboznov, A.Yu.Rusanov *et al.*,
Phys. Rev. Lett. 86, 2427 (2001).

[2] J.E. Mooij *et al.*, Science 285 (1999).

[3] G. Blatter et al. Cond-mat/9912163 (1999).

[4] E.Terzioglu, M.R. Beasley, IEEE Trans. Appl. Superc. 8 (1998) 48.