Publication highlights

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   In collaboration with IBM Quantum, recent work by Guo-Yi Zhu and Simon Trebst appeared today on the preprint server arXiv. The paper entitled Realizing the...

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 Linkden were able to...

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   [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 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     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...

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...

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   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...

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...

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 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...

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...

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...

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...

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 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...

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...

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...

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...

Inter-site collaboration demonstrates wavelength conversion of single photons emitted by semiconductor quantum dots   ML4Q researchers from Bonn and Jülich have published recent results in Optics Letters on wavelength conversion at the single-photon level - a...

Busley et al. bring these advantages to quantum gases of light and explore a textbook scenario: a two-dimensional, spatially uniform gas of bosons.[from Photons think inside the box, Perspective, Science 375 (6586), pp. 1355-1356, 2022]The group of Martin Weitz...

In an international multi-site cooperation, scientists from the ML4Q Cluster of Excellence are able to observe quantum effects in cause and effect relationship in a photonic experiment. Understanding causal relationships in the observed data is a deeply rooted concept...

Topological insulators hold promise as a platform for unique quantum phenomena. However, realizing these phenomena experimentally requires sophisticated devices. In a Technical Review in Nature Reviews Physics, ML4Q spokesperson Yoichi Ando and ML4Q associated member...

Several scientists around ML4Q members, Bert Voigtländer, Stefan Tautz and Detlev Grützmacher, at Forschungszentrum Jülich have succeeded in taking an important step towards the realization of novel electronic components. Using a special four-tip scanning tunneling...

In a coordinated work with Gunther Springholz (Johannes Kepler University, Austria) and Oliver Rader (Helmholtz Zentrum Berlin for Materials and Energy), ML4Q member Markus Morgenstern at RWTH Aachen published the results of recent work on ferromagnetic topological...