Projects & Collaborations 22 foundShow per page10 10 20 50 Ultra high precision electron beam lithography system for nanodevice and nanostructures definition Research Project | 6 Project MembersIn the last decades nano- and quantum-science have been steadily growing in large part also thanks to the availability of ever more advanced processing, manipulation, and imaging tech-niques. Specifically, nanofabrication has been the leading enabler of experiments and devices, in which quantum mechanics play a key role. The University of Basel is nationally and internationally recognized as a leader innanoscience and nanotechnology. It was the leading house of the National Center in Competence and Re-search (NCCR) on Nanoscience, which later became the Swiss Nanoscience Institute (SNI). The University of Basel is leading the NCCR SPIN for the realization of spin qubits in Silicon and is also co-leading the NCCR QSIT on Quantum Science and Technology (with ETHZ as Leading House). The present proposal to the SNF R'Equip scheme is a joint effort of six principal investigators (PIs) in the physics department of the University of Basel, who work on current topics in quantum- and nano-science. The PIs, who submit this proposal together, do research that relies on the availability of state-of-the-art fabrication tools, such as an electron beam lithography (EBL) system. The proposal makes the case for the purchase of an ultra-high precision EBL system that combines high resolution, tunable acceleration voltages, different write-field size, ultra-high precision alignment, proximity correction, and mechanical stability. This combination is unique and crucial for the University of Basel to stay at the forefront of nano-science and technology. The system will be installed in the new clean room shared between the University of Basel and the Department of Biosystem Science and Engineering of the ETH. Therefore, the purchased system will be available for the users of the clean-room. Scanning Nanowire Quantum Dot Research Project | 2 Project MembersIn this project we aim to combine the exceptional sensitivity of nanowire quantum dots as detectors of charge with scanning probe capabilities of customized cantilevers. The resulting scanning nanowire quantum dot will enable imaging of localized charges and electron densities with high sensitivity, high resolution, and under a large variety of environmental circumstances. QUSTEC PhD fellowship - Germanium Silicon Nanowire Nanostructures Research Project | 1 Project Membersabstract QUSTEC PhD fellowship - Quantum transport at microkelvin temperatures Research Project | 1 Project Membersabstract QUSTEC PhD fellowship - Spectroscopy of Subgap States in Semiconducting Nanowires with Proximitized Superconductivity Research Project | 4 Project MembersOriginal Title: Quantum transport in superconductor-semiconductor nanowire hybrid devices with axially built-in quantum dots as spectrometers Abstract: The project is motivated by the recent excitement of the appearance of topological phases and Majorana bound states (MBSs) in semiconducting nanowires (NWs) with strong spin-orbit interaction (SOI) coupled to a superconductor (SC) in magnetic field. To unravel the emergence of MBSs in single and coupled NWs, we develop new probes with which the proximity gap and proximity-induced bound states can be quantified. Our approach is based on measuring both DC and AC transport, the latter also at GHz frequencies using reflectometry. As a complementary test, we can also study the microwave radiation in the GHz domain emitted by the quantum device. With the current project we aim to deepen our understanding of the superconductive proximity effect in a NW with strong SOI by studying the evolution of the gap spectroscopically. For the latter we exploit quantum dots (QDs) as spectrometers. Here, the QDs are established by heteroepitaxy during growth. This is done in collaboration with Prof. Lucia Sorba from CNR-Nano at Pisa, where the InAs NWs are grown (see figure). These QDs are very promising due to the large confinement potential. We further plan to test different SCs beyond Al, e.g. Pd and MoRe, and optimize the evaporation together with collaborators from the Niels-Bohr Institute in Copenhagen. p.s. in the meantime the material system was changed to 2D InAs quantum proximitized from above by a thin Al layer. This material is provided by the Mafra group (Purdue Univ. USA). EMP / European Microkelvin Platform Research Project | 1 Project MembersThe European Microkelvin Platform (EMP) provides access to the ultralow temperature frontier approaching absolute zero. The Platform is continuously evolving by extending its reach, building on the integration achieved through previous infrastructure calls. Europe already has a significant research lead in the microkelvin regime and we will reinforce this by encouraging the further exploitation, in both the shorter and longer term, of ultralow temperatures for the development of new concepts, new applications and new devices, especially in the fields of nanoscience, materials research and quantum technology in all its forms. The EMP is a consortium of 17 partners which provide an extensive portfolio of capacities and expertise in ultralow temperature physics. Since this is a fast evolving and expanding frontier field, we also lay considerable weight on improving and upgrading our infrastructure, since the lowest accessible temperatures are continuously falling. These advances allow us, and our users from across Europe, to study new phenomena, thereby generating new knowledge, applications and commercial opportunities. We have a particular interest in the benefits of ultralow temperature physics for driving forward the inter-related areas of quantum materials, nanoscience, and quantum technology. The activities of the EMP hold enormous potential for innovation. Georg H. Endress Postdoctoral Fellow Dr. Artem Kononov Research Project | 3 Project MembersThe project is concerned with topological insulators and unconventional superconductivity induced by proximity effect or of intrinsic nature in 2D van der Waals heterostructures. It is funded as a Georg H. Endress Postdoctoral Fellowship. Georg H. Endress Postdoctoral Fellow Dr. Andreas Kuhlmann Research Project | 2 Project MembersThe project aims to develop elements for scalable quantum computation with CMOS qubits Quantum Coherence in Nanoscale Systems Research Project | 1 Project MembersDie Quantenphysik wurde zwar schon vor über hundert Jahren entwickelt, allerdings ist es erst in jüngster Zeit, dass wir die Möglichkeiten in Händen halten um einzelne Quantensysteme im Labor zu untersuchen, zu verstehen, und kontrolliert zu manipulieren. Dies öffnet uns die Türen zur fundamentalen Studie der Gesetze der Quantenmechanik, z. B. in nanostrukturierten Proben, und legt das Fundament für zukünftige Quantentechnologien wie Quantencomputing und neue Quantenmaterialien. Die experimentelle Realisierung neuer Quantenzustände in Nanosystemen - mit dem Potenzial zukünftig als Qubits zu fungieren - und die Erforschung der zugrundeliegenden Physik gehört zu den spannendsten und aktivsten Forschungsgebieten der heutigen Festkörperphysik. Lay summary Zahlreiche Arbeitsgruppen arbeiten weltweit daran, mit Hightech-Kühlschränken Temperaturen möglichst nahe am absoluten Nullpunkt zu erreichen. Dieser liegt bei 0 Kelvin oder −273,15 °C. Für Physiker ist es erstrebenswert ihre Apparaturen soweit abzukühlen, dass sie diesem Kältemaximum möglichst nahekommen, da diese extrem tiefen Temperaturen ideale Bedingungen für Quantenexperimente bieten und sich ganz neue physikalische Phänomene untersuchen lassen. Das Prinzip der magnetischen Kühlung kann auch in der Nanoelektronik eingesetzt werden um damit Nanoelektronik Geräte auf Temperaturen nahe dem absoluten Nullpunkt abzukühlen. In diesem Projekt wollen wir Temperaturen unter 1 mK in Nanoelektronischen Schaltkreisen erreichen. Bei solch tiefen Temperaturen lassen sich auch stabilere Quanten Bits, kurz Qubits, realisieren, die als Informationseinheit eines zukünftigen Quantencomputers dienen. Wir untersuchen solche Qubits in Halbleitermaterialien und untersuchen sie auf Ihre Stabilität und wie geeignet sie für Quantenrechner sind. Ausserdem untersuchen wir neuartige topologische Randzustände mit Hilfe von Quantendrähten. G. H. Endress Postdoc-Cluster Research Project | 5 Project MembersDas Departement für Physik der Philosophisch-Naturwissenschaftlichen Fakultät der Universität Basel und das Physikalische Institut der Fakultät für Mathematik und Physik der Albert Ludwigs-Universität Freiburg im Breisgau errichten partnerschaftlich ein neues Exzellenzzentrum mit den Forschungsschwerpunkten "Quantum Science and Quantum Computing" unter dem Dach von Eucor - The European Campus . Als tragende Säule dieses Exzellenzzentrums wird ein grenzüberschreitender Postdoc-Cluster zwischen den Universitäten Basel und Freiburg aufgebaut. Primäre Ziele des zukünftigen Postdoc-Clusters sind die hochwertige Ausbildung der Postdocs für den akademischen als auch wirtschaftlichen Arbeitsmarkt und die Positionierung als führende Forschungseinrichtung auf dem Gebiet "Quantum Science and Quantum Computing", im Speziellen durch die verstärkte grenzüberschreitende Zusammenarbeit im Dreiländereck Deutschland-Frankreich-Schweiz. Das Exzellenzzentrum "Quantum Science and Quantum Computing" wird von der Georg H. Endress Stiftung finanziell unterstützt. 123 123
Ultra high precision electron beam lithography system for nanodevice and nanostructures definition Research Project | 6 Project MembersIn the last decades nano- and quantum-science have been steadily growing in large part also thanks to the availability of ever more advanced processing, manipulation, and imaging tech-niques. Specifically, nanofabrication has been the leading enabler of experiments and devices, in which quantum mechanics play a key role. The University of Basel is nationally and internationally recognized as a leader innanoscience and nanotechnology. It was the leading house of the National Center in Competence and Re-search (NCCR) on Nanoscience, which later became the Swiss Nanoscience Institute (SNI). The University of Basel is leading the NCCR SPIN for the realization of spin qubits in Silicon and is also co-leading the NCCR QSIT on Quantum Science and Technology (with ETHZ as Leading House). The present proposal to the SNF R'Equip scheme is a joint effort of six principal investigators (PIs) in the physics department of the University of Basel, who work on current topics in quantum- and nano-science. The PIs, who submit this proposal together, do research that relies on the availability of state-of-the-art fabrication tools, such as an electron beam lithography (EBL) system. The proposal makes the case for the purchase of an ultra-high precision EBL system that combines high resolution, tunable acceleration voltages, different write-field size, ultra-high precision alignment, proximity correction, and mechanical stability. This combination is unique and crucial for the University of Basel to stay at the forefront of nano-science and technology. The system will be installed in the new clean room shared between the University of Basel and the Department of Biosystem Science and Engineering of the ETH. Therefore, the purchased system will be available for the users of the clean-room.
Scanning Nanowire Quantum Dot Research Project | 2 Project MembersIn this project we aim to combine the exceptional sensitivity of nanowire quantum dots as detectors of charge with scanning probe capabilities of customized cantilevers. The resulting scanning nanowire quantum dot will enable imaging of localized charges and electron densities with high sensitivity, high resolution, and under a large variety of environmental circumstances.
QUSTEC PhD fellowship - Germanium Silicon Nanowire Nanostructures Research Project | 1 Project Membersabstract
QUSTEC PhD fellowship - Quantum transport at microkelvin temperatures Research Project | 1 Project Membersabstract
QUSTEC PhD fellowship - Spectroscopy of Subgap States in Semiconducting Nanowires with Proximitized Superconductivity Research Project | 4 Project MembersOriginal Title: Quantum transport in superconductor-semiconductor nanowire hybrid devices with axially built-in quantum dots as spectrometers Abstract: The project is motivated by the recent excitement of the appearance of topological phases and Majorana bound states (MBSs) in semiconducting nanowires (NWs) with strong spin-orbit interaction (SOI) coupled to a superconductor (SC) in magnetic field. To unravel the emergence of MBSs in single and coupled NWs, we develop new probes with which the proximity gap and proximity-induced bound states can be quantified. Our approach is based on measuring both DC and AC transport, the latter also at GHz frequencies using reflectometry. As a complementary test, we can also study the microwave radiation in the GHz domain emitted by the quantum device. With the current project we aim to deepen our understanding of the superconductive proximity effect in a NW with strong SOI by studying the evolution of the gap spectroscopically. For the latter we exploit quantum dots (QDs) as spectrometers. Here, the QDs are established by heteroepitaxy during growth. This is done in collaboration with Prof. Lucia Sorba from CNR-Nano at Pisa, where the InAs NWs are grown (see figure). These QDs are very promising due to the large confinement potential. We further plan to test different SCs beyond Al, e.g. Pd and MoRe, and optimize the evaporation together with collaborators from the Niels-Bohr Institute in Copenhagen. p.s. in the meantime the material system was changed to 2D InAs quantum proximitized from above by a thin Al layer. This material is provided by the Mafra group (Purdue Univ. USA).
EMP / European Microkelvin Platform Research Project | 1 Project MembersThe European Microkelvin Platform (EMP) provides access to the ultralow temperature frontier approaching absolute zero. The Platform is continuously evolving by extending its reach, building on the integration achieved through previous infrastructure calls. Europe already has a significant research lead in the microkelvin regime and we will reinforce this by encouraging the further exploitation, in both the shorter and longer term, of ultralow temperatures for the development of new concepts, new applications and new devices, especially in the fields of nanoscience, materials research and quantum technology in all its forms. The EMP is a consortium of 17 partners which provide an extensive portfolio of capacities and expertise in ultralow temperature physics. Since this is a fast evolving and expanding frontier field, we also lay considerable weight on improving and upgrading our infrastructure, since the lowest accessible temperatures are continuously falling. These advances allow us, and our users from across Europe, to study new phenomena, thereby generating new knowledge, applications and commercial opportunities. We have a particular interest in the benefits of ultralow temperature physics for driving forward the inter-related areas of quantum materials, nanoscience, and quantum technology. The activities of the EMP hold enormous potential for innovation.
Georg H. Endress Postdoctoral Fellow Dr. Artem Kononov Research Project | 3 Project MembersThe project is concerned with topological insulators and unconventional superconductivity induced by proximity effect or of intrinsic nature in 2D van der Waals heterostructures. It is funded as a Georg H. Endress Postdoctoral Fellowship.
Georg H. Endress Postdoctoral Fellow Dr. Andreas Kuhlmann Research Project | 2 Project MembersThe project aims to develop elements for scalable quantum computation with CMOS qubits
Quantum Coherence in Nanoscale Systems Research Project | 1 Project MembersDie Quantenphysik wurde zwar schon vor über hundert Jahren entwickelt, allerdings ist es erst in jüngster Zeit, dass wir die Möglichkeiten in Händen halten um einzelne Quantensysteme im Labor zu untersuchen, zu verstehen, und kontrolliert zu manipulieren. Dies öffnet uns die Türen zur fundamentalen Studie der Gesetze der Quantenmechanik, z. B. in nanostrukturierten Proben, und legt das Fundament für zukünftige Quantentechnologien wie Quantencomputing und neue Quantenmaterialien. Die experimentelle Realisierung neuer Quantenzustände in Nanosystemen - mit dem Potenzial zukünftig als Qubits zu fungieren - und die Erforschung der zugrundeliegenden Physik gehört zu den spannendsten und aktivsten Forschungsgebieten der heutigen Festkörperphysik. Lay summary Zahlreiche Arbeitsgruppen arbeiten weltweit daran, mit Hightech-Kühlschränken Temperaturen möglichst nahe am absoluten Nullpunkt zu erreichen. Dieser liegt bei 0 Kelvin oder −273,15 °C. Für Physiker ist es erstrebenswert ihre Apparaturen soweit abzukühlen, dass sie diesem Kältemaximum möglichst nahekommen, da diese extrem tiefen Temperaturen ideale Bedingungen für Quantenexperimente bieten und sich ganz neue physikalische Phänomene untersuchen lassen. Das Prinzip der magnetischen Kühlung kann auch in der Nanoelektronik eingesetzt werden um damit Nanoelektronik Geräte auf Temperaturen nahe dem absoluten Nullpunkt abzukühlen. In diesem Projekt wollen wir Temperaturen unter 1 mK in Nanoelektronischen Schaltkreisen erreichen. Bei solch tiefen Temperaturen lassen sich auch stabilere Quanten Bits, kurz Qubits, realisieren, die als Informationseinheit eines zukünftigen Quantencomputers dienen. Wir untersuchen solche Qubits in Halbleitermaterialien und untersuchen sie auf Ihre Stabilität und wie geeignet sie für Quantenrechner sind. Ausserdem untersuchen wir neuartige topologische Randzustände mit Hilfe von Quantendrähten.
G. H. Endress Postdoc-Cluster Research Project | 5 Project MembersDas Departement für Physik der Philosophisch-Naturwissenschaftlichen Fakultät der Universität Basel und das Physikalische Institut der Fakultät für Mathematik und Physik der Albert Ludwigs-Universität Freiburg im Breisgau errichten partnerschaftlich ein neues Exzellenzzentrum mit den Forschungsschwerpunkten "Quantum Science and Quantum Computing" unter dem Dach von Eucor - The European Campus . Als tragende Säule dieses Exzellenzzentrums wird ein grenzüberschreitender Postdoc-Cluster zwischen den Universitäten Basel und Freiburg aufgebaut. Primäre Ziele des zukünftigen Postdoc-Clusters sind die hochwertige Ausbildung der Postdocs für den akademischen als auch wirtschaftlichen Arbeitsmarkt und die Positionierung als führende Forschungseinrichtung auf dem Gebiet "Quantum Science and Quantum Computing", im Speziellen durch die verstärkte grenzüberschreitende Zusammenarbeit im Dreiländereck Deutschland-Frankreich-Schweiz. Das Exzellenzzentrum "Quantum Science and Quantum Computing" wird von der Georg H. Endress Stiftung finanziell unterstützt.
