Publication highlights
A breakthrough on the edge: New topological qubit developments published in Nature Physics
It is widely recognized that magnetization and superconductivity are typically mutually exclusive. However, the study by Uday and co-workers provides compelling evidence for the presence of superconducting correlation within the chiral edge mode of proximitized QAH...
Fundamental Equation for Superconducting Quantum Bits Revised
Fundamental Equation for Superconducting Quantum Bits Revised Quantum bits can be described more precisely with the help of newly discovered harmonics as a team of 30 researchers reports in Nature Physics. Researchers at the University of Cologne, in a...
A Tale of Three Papers: Julian Schmitt looks back on his scientific journey over the past four years
Julian Schmitt looks back on his scientific journey over the past four yearsA Tale of Three Papers Julian Schmitt looks back on his scientific journey over the past four years Explore the world of quantum optics and photon Bose-Einstein condensates as we...
This month in Physical Review X: Quantum computers to test for the first time Jarzynski’s equality for many interacting particles
Quantum computers to test for the first time Jarzynski’s equality for many interacting particles Joint efforts including the Luitz (Bonn) and Rizzi (Cologne/Jülich) Groups yield results published in Physical Review X earlier this month Statistical mechanics is...
Qubit fractionalization induced by coherent errors and weak measurements
Qubit fractionalization and emergent Majorana liquid in the honeycomb Floquet code induced by coherent errors and weak measurements Use the slider to read the story of this paper as Simon Trebst summarizes it in 6 images: In quantum error correction,...
Satellite-Based Quantum Key Distribution in the Presence of Bypass Channels
ML4Q associated member and Independence Grant Fellow, Frederico Grasselli (Bruss group, HHU Düsseldorf) co-authored a paper which was published on November 1st in PRX Quantum. In the joint work, the authors explore the security of discrete- and continuous-variable QKD...
Michael Buchhold co-authors a Nature Physics paper on a Hubbard exciton fluid in Mott insulators
Michael Buchhold co-authors a Nature Physics paper on a Hubbard exciton fluid in Mott insulators A Hubbard exciton fluid in a photo-doped antiferromagnetic Mott insulator is the title of a paper arising from a cooperation between ML4Q member, Michael Buchhold...
Today on arXiv: Joint work by the Trebst group together with IBM Quantum on Nishimori transition
Today on arXiv: Joint work by the Trebst group together with IBM Quantum on Nishimori transition Update: The preprint was published on November 15 in Phys. Rev. Lett.Nishimori’s Cat: Stable Long-Range Entanglement from Finite-Depth Unitaries and Weak...
Topological states of light and matter in systems with trivial band structures
Topological states of light and matter in systems with trivial band structures Topological states of light and matter don't always require complicated lattice band structures. In their joint work, ML4Q members Julian Schmitt and Stefan Linden were able to...
Conference key agreement in a quantum network
ML4Q associated member and Independence Grant Fellow, Frederico Grasselli (Bruss group, HHU Düsseldorf) co-authored a paper which was published a few days ago in npj Quantum Information. The publication is a collaboration with Alexander Pickston, Joseph Ho,...
Hans Kroha co-authors a Nature Physics article on quantum phase transitions
Hans Kroha co-authors a Nature Physics article on quantum phase transitions [according to the press release of the University of Bonn] Many substances change their properties when they are cooled below a certain critical temperature. Such a phase...
Preprint from Ando group recommended in the Journal Club for Condensed Matter Physics
Preprint from Ando group recommended in the Journal Club for Condensed Matter Physics The preprint entitled "Induced superconducting correlations in the quantum anomalous hall insulator" by Anjana Uday et al. was recommended for discussion in the Journal Club for...
New work on quantum dynamics of regularized superconducting circuits
New work on quantum dynamics of regularized superconducting circuits Building a universal quantum computer is a challenging task because physical quantum bits, or qubits, are imperfect. The pursuit of novel qubit designs, which strive for tailored...
Joint work on chaos aspects of quantum computers continues
We reported one year ago about the successful research conducted in the ML4Q groups of Simon Trebst, Alex Altland and David DiVincenzo which analyzed cutting edge device structures to demonstrate that some of them are indeed operating dangerously close to a threshold...
Exciting bilayer graphene characteristics published in Nature
Near perfect particle-hole symmetry in graphene quantum dots Researchers at RWTH Aachen University and Forschungszentrum Jülich have uncovered important characteristics of double quantum dots in bilayer graphene, an increasingly promising material for possible...
Cross-Site Paper on Statistical Majorana Bound State Spectroscopy
Cross-Site Paper on Statistical Majorana Bound State Spectroscopy The groups of Fabian Hassler (RWTH) and Reinhold Egger (HHU Düsseldorf) have been cooperating on several projects to theoretically investigate signatures of Majorana zero modes that are...
Publication in Nature Communications on quantum Rabi dynamics of trapped atoms
In a collaboration with Enrique Rico and Enrique Solano (Department of Physical Chemistry, University of the Basque Country), Martin Weitz recently published the work of his group on quantum Rabi dynamics of trapped ions. The coupling of a two-level system with an...
Study investigates Gallium deposition amount prior to In droplet epitaxy and its effect on the formation of a wetting layers in quantum dots
Work by the group of ML4Q member Beata Kardynal was recently published in Nanotechnology. The publication reports on results obtained in a study which investigates Gallium deposition amount prior to In droplet epitaxy and its effect on the formation of a wetting...
Work published in Physical Review Letters shows that fluctuations and response of a BEC to a bath of molecules are directly linked by thermal energy
Work by ML4Q Young Investigator Julian Schmitt and his team was recently published in Physical Review Letters. The discussed results show that fluctuations and response of a BEC to a bath of molecules are directly linked by thermal energy. The results demonstrate "the...
Study suggests a platform for the realization of fully in vacuo quasi-1D nanostructures of three dimensional topological insulators
Joint work of ML4Q members Mussler, Schüffelgen, Grützmacher, Schäpers and Mayer at Forschungszentrum Jülich was recently published in Nanomaterials. In the work, the authors introduce a platform that facilitates the realization of fully in vacuo quasi-1D...
Publication in Nanomaterials about electronic transport properties of a multi terminal Josephson junction
Joint work of ML4Q members Mussler, Schüffelgen, Grützmacher and Schäpers at Forschungszentrum Jülich was recently published in Nanomaterials. The publication reports on results obtained in a study of the properties of superconductivity induced into a topological...
Schreiber and Bluhm group demonstrate electron transport on a quantum chip
Lars Schreiber and Hendrik Bluhm have now come a significant step closer to solve qubit connectivity on semiconductor chips. Their team succeeded in transferring electrons, the carriers of quantum information, over several micrometres on a quantum chip. Their "quantum...
New insights into Quantum Conference Key Agreement by the Bruss group published in PRX Quantum
ML4Q researchers from Düsseldorf (Bruss group) have published a paper in PRX Quantum on Quantum Conference Key Agreement.Congratulations to all the authors on their impressive results! Publication Federico Grasselli, Gláucia Murta, Jarn de Jong, Frederik Hahn,...
Quantum computing breakthrough in error correction
Quantum computing breakthrough in error correction Researchers at ETH Zurich, supported by the Theoretical Quantum Technology Group at RWTH Aachen and Forschungszentrum Jülich as well as by colleagues in Canada, have succeeded, for the first time, in quickly and...
Error-Free Quantum Computing gets real – Fundamental building blocks for fault-tolerant quantum computing demonstrated
Error-free quantum computing gets real Fundamental building blocks for fault-tolerant quantum computing demonstrated For quantum computers to be useful in practice, errors must be detected and corrected. A research group at RWTH Aachen University, in...
Quantum one-way street in topological insulator nanowires
Quantum one-way street in topological insulator nanowires Very thin wires made of a topological insulator could enable highly stable qubits, the building blocks of future quantum computers. Scientists see a new result in topological insulator devices as an important...
Quantum Computing challenged by disorder – study published in Nature Communications
Research conducted in the ML4Q groups of Simon Trebst, Alex Altland and David DiVincenzo analyzed cutting edge device structures to demonstrate that some of them are indeed operating dangerously close to a threshold of chaotic meltdown. The challenge is to walk a thin...
First Hybrid Quantum Bit Based on Topological Insulators
First Hybrid Quantum Bit Based on Topological Insulators Scientists at Forschungszentrum Jülich take an important step on the path towards topological quantum computers With their superior properties, topological qubits could help achieve a...
Realization of proximity-induced superconductivity in a topological-insulator nanowire
The Ando group has developed a new methodology to realize proximity-induced superconductivity in a topological-insulator nanowire. The work was conducted in cooperation with the Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons at Forschungszentrum...
2D materials for next generation computing
In a compact comment published in Nature Communications, Max Lemme, Christoph Stampfer and colleagues outline the most promising fields of applications of two-dimensional (2D) materials, as well as the challenges that still need to be solved to see the appearance of...