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Quiet SDS Josephson Junctions for Quantum Computing | | L.B. Ioffe
; V.B. Geshkenbein
; M.V. Feigelman
; A.L. Fauchere
; G. Blatter
; | | Date: |
7 Sep 1998 | | Journal: | Nature 398, 679 (1999). | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | 1,3), V.B. Geshkenbein (2,3), M.V. Feigelman , A.L. Fauchere , and G. Blatter , ( Department of Physics and Astronomy, Rutgers University, NJ Theoretische Physik, Eidgenoessische Technische Hochschule, Zuerich Landau Institute for Theoretical Physics | | Abstract: | Unconventional superconductors exhibit an order parameter symmetry lower than the symmetry of the underlying crystal lattice. Recent phase sensitive experiments on YBCO single crystals have established the d-wave nature of the cuprate materials, thus identifying unambiguously the first unconventional superconductor. The sign change in the order parameter can be exploited to construct a new type of s-wave - d-wave - s-wave Josephson junction exhibiting a degenerate ground state and a double-periodic current-phase characteristic. Here we discuss how to make use of these special junction characteristics in the construction of a quantum computer. Combining such junctions together with a usual s-wave link into a SQUID loop we obtain what we call a `quiet’ qubit --- a solid state implementation of a quantum bit which remains optimally isolated from its environment. | | Source: | arXiv, cond-mat/9809116 | | Services: | Forum | Review | PDF | Favorites | |
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