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Quantum theory of condensed matter: spin effects in nanostructures and quantum information

English title Quantum theory of condensed matter: spin effects in nanostructures and quantum information
Applicant Loss Daniel
Number 182058
Funding scheme Project funding (Div. I-III)
Research institution Departement Physik Universität Basel
Institution of higher education University of Basel - BS
Main discipline Condensed Matter Physics
Start/End 01.10.2019 - 30.09.2023
Approved amount 1'200'000.00
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Keywords (4)

magnonics and skyrmions; quantum computation and surface code; Hole spin qubits in nanowires; Majorana fermion and parafermion qubits

Lay Summary (German)

Lead
Unser Forschubgsprojekt befasst sich mit der theoretischen Quantenphysik von Festkoerpersystemen mit Schwerpunkt auf Quantum Computing. Ein wichtiges Ziel ist, die Grundlagenprobleme, die beim Bau eines Quantencomputers im Halbleiter auftreten, zu verstehen und zu loesen. Wir sind Pioniere auf diesem Gebiet und gehoeren zu den weltweit fuehrenden Gruppen.
Lay summary

Das vorliegende Forschungsprojekt befasst sich mit mehreren zusammenhaengenden Fragestellungen aus dem Gebiet der Quantentheorie des Festkoerpers und Quantum Computing. Es traegt zum langfristigen Ziel bei, realistische Architekturen zu finden, die eine phasenkohaerente Manipulation von Festkoerpersystemen auf dem Quantenniveau erlauben. Da dieses Ziel  notwendigerweise das Grundlagenstudium von komplexen Vielteilchensystemen involviert, erstreckt sich unsere Forschung ueber viele Untergebiete der modernen Quantenphysik im Festkoerper und benutzt dazu eine breite Palette von hochspezialisierten mathematischen Methoden. Ein Hauptschwerpunkt sind Spinsysteme  im Halbleiter, die wahrscheinlich vielversprechendensten Kandidatensysteme fuer Quanetncomputer ueberhaupt.

 
Direct link to Lay Summary Last update: 14.06.2019

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Associated projects

Number Title Start Funding scheme
152896 Quantum theory of condensed matter: spin effects in nanostructures and quantum information 01.10.2014 Project funding (Div. I-III)

Abstract

RESEARCH SUMMARYThe proposed research covers and interconnects multiple topics from the fields of quantum computing and quantum condensed-matter theory. It contributes to the long term goal of finding realistic architectures that allow the coherent manipulation of solid state systems at the quantum level. Since this goal necessarily involves the study of complex many-body systems, our research goes across many subfields of modern condensed matter and solid state theory and uses a very broad range of sophisticated technical tools.The strategy we pursue encompasses the refinement of the well-established scheme of spin-based quantum computing, as well as efforts to discover novel and realistic platforms that allow the storage and manipulation of quantum information. In view of the desired industrial feasibility and scalability of the results, we focus on the solid state as the basis of our research. Exciting and promising new materials will be examined and their suitability for quantum information processing will be evaluated. Moreover, we will study intriguing issues that are also of interest in fundamental research, ranging from exotic types of topological quantum phases to non- equilibrium dynamics, with focus on spin effects in semiconducting, superconducting, and insulating magnetic nanostructures. Also these fundamental aspects of our proposal are targeted on the ability to gain access to the quantum world. In particular, we plan to work on the following topics:2.A Quantum information and surface code2.B Spin qubits in Si and Ge nanowires2.C Majorana fermion qubits and hybrid spin qubits2.D Stability of topological excitations and qubits2.E Proximity effect in semiconducting nanostructures2.F Topological magnonics2.G Quantum effects of magnetic Skyrmions
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