Majorana-highway on a chip

News - 06 July 2017

The first experimental evidence of a Majorana fermion in Delft 2012 led to a wave of scientific enthusiasm: control such particles are a holy grail in quantum science and technology. Quantum chips based on Majorana fermions promise error-protected quantum computations. However, the fabrication of Majorana-devices is an extremely challenging task.

A collaboration of researchers has now combined novel nanowires with a high-quality interface to other required materials on a chip. This allows for bullet-like collisionless quantum transport of charges through the nanowires: a requirement for larger-scale Majorana-based experiment.

The novel methods open doors towards quantum computations based on Majorana fermions, allow for the exploration of new quantum effects in such materials ánd can have future applications in energy-efficient electronics.

See the infographic made by Bruno van Wayenburg for all interesting details of this novel quantum chip and its future applications.

Hao Zhang (left) and Önder Gül with the Majorana-chip and experimental setup.

Ballistic superconductivity in semiconductor nanowires

Hao Zhang,1,2, Önder Gül,1,2,† Sonia Conesa-Boj,1,2,3 Michal P. Nowak,1,2,4 Michael Wimmer,1,2 Kun Zuo,1, 2 Vincent Mourik,1, 2 Folkert K. de Vries,1, 2 Jasper van Veen,1, 2 Michiel W.A. de Moor,1, 2 Jouri D.S. Bommer,1, 2 David J. van Woerkom,1, 2 Diana Car,3 Sébastien R. Plissard,2, 3Erik P.A.M. Bakkers,1, 2, 3 Marina Quintero-Pérez,1, 5 Maja C. Cassidy,1, 2 Sebastian Koelling,3 Srijit Goswami,1, 2 Kenji Watanabe,6 Takashi Taniguchi,6 and Leo P. Kouwenhoven1, 2, 7, ‡

1 QuTech, Delft University of Technology, 2600 GA Delft, The Netherlands
2 Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands
3 Department of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
4 AGH University of Science and Technology,Faculty of Physics and Applied Computer Science,al. A. Mickiewicza 30, 30-059 Kraków, Poland
5 Netherlands Organisation for Applied Scientific Research (TNO), 2600 AD Delft, The Netherlands
6 Advanced Materials Laboratory, National Institute forMaterials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
7 Microsoft Station Q Delft, 2600 GA Delft, The Netherlands

H.Zhang-3@tudelft.nl; These authors contributed equally to this work.

Gul.Onder@gmail.com; These authors contributed equally to this work.

L.P.Kouwenhoven@tudelft.nl

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