@Article{Feofanov_etal2010,
author="Feofanov, A. K.
and Oboznov, V. A.
and Bol{\textquoteright}Ginov, V. V.
and Lisenfeld, J.
and Poletto, S.
and Ryazanov, V. V.
and Rossolenko, A. N.
and Khabipov, M.
and Balashov, D.
and Zorin, A. B.
and Dmitriev, P. N.
and Koshelets, V. P.
and Ustinov, A. V.",
title="Implementation of superconductor/ferromagnet/ superconductor",
journal="Nature Physics",
year="2010",
volume="6",
number="8",
pages="593--597",
optkeywords="fromIPMRAS",
abstract="High operation speed and low energy consumption may allow the superconducting digital single-flux-quantum circuits to outperform traditional complementary metal-oxide-semiconductor logic. The remaining major obstacle towards high element densities on-chip is a relatively large cell size necessary to hold a magnetic flux quantum {\^I}{\textbrokenbar}0. Inserting a {\"I}{\texteuro}-type Josephson junction in the cell is equivalent to applying flux {\^I}{\textbrokenbar}0/2 and thus makes it possible to solve this problem. Moreover, using {\"I}{\texteuro}-junctions in superconducting qubits may help to protect them from noise. Here we demonstrate the operation of three superconducting circuits-two of them are classical and one quantum-that all utilize such {\"I}{\texteuro}-phase shifters realized using superconductor/ferromagnet/superconductor sandwich technology. The classical circuits are based on single-flux-quantum cells, which are shown to be scalable and compatible with conventional niobium-based superconducting electronics. The quantum circuit is a {\"I}{\texteuro}-biased phase qubit, for which we observe coherent Rabi oscillations. We find no degradation of the measured coherence time compared to that of a reference qubit without a {\"I}{\texteuro}-junction.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=805), last updated on Wed, 09 May 2012 11:59:41 -0500"
}