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Fast microwave beam splitters from superconducting resonators

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arxiv 1302.0729 v1 pith:WVUDGQMY submitted 2013-02-04 cond-mat.mes-hall cond-mat.supr-conquant-ph

Fast microwave beam splitters from superconducting resonators

M. Haeberlein , D. Zueco , P. Assum , T. Wei{\ss}l , E. Hoffmann , B. Peropadre , J.J. Garc\'ia-Ripoll , E. Solano
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F. Deppe A. Marx R. Gross
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classification cond-mat.mes-hall cond-mat.supr-conquant-ph
keywords beamcouplingfastresonatorssuperconductingtwo-modecoupledquantum
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Coupled superconducting transmission line resonators have applications in quantum information processing and fundamental quantum mechanics. A particular example is the realization of fast beam splitters, which however is hampered by two-mode squeezer terms. Here, we experimentally study superconducting microstrip resonators which are coupled over one third of their length. By varying the position of this coupling region we can tune the strength of the two-mode squeezer coupling from 2.4% to 12.9% of the resonance frequency of 5.44GHz. Nevertheless, the beam splitter coupling rate for maximally suppressed two-mode squeezing is 810MHz, enabling the construction of a fast and pure beam splitter.

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