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Informatik - Forschung und Entwicklung

Quantum lithography: A non-computing application of quantum information

Colin P. Williams, Pieter Kok, Hwang Lee, Jonathan P. Dowling

Published Sep 26, 2006• 11 citations
Publisher
DOI
10.1007/s00450-006-0017-6

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Broadband quantum-limited amplifiers are essential for quantum information processing, yet challenges in design and fabrication continue to hinder their widespread applications. Here, we introduce the broadband merged-element Josephson parametric amplifier in which the discrete parallel capacitor is directly integrated with the Josephson junctions. This merged-element design eliminates the shortcomings of discrete capacitors, simplifying the fabrication process, reducing the need for high-precision lithography tools and ensuring compatibility with standard superconducting qubit fabrication procedures. Experimental results demonstrate a gain of 15 dB over a 500 MHz bandwidth, a mean saturation power of −116 dBm, and near-quantum-limited noise performance. This robust readily implemented parametric amplifier holds significant promise for broader applications in superconducting quantum information and the advancement of quantum computation.