Researchers have developed a novel method to trace light fields directly inside cavities, providing in-situ measurement where future field-resolved studies of light-matter interactions will happen.

Scientists at Honda Research Institute USA, Inc. (HRI-US) have made a significant breakthrough in the fields of quantum materials and quantum communications by developing a novel method for growing atomically thin "nanoribbons" – one atom thick and tens of atoms-wide ribbon-shaped materials – enabling unbreakable secure communication of sensitive information.

In a new paper in Nature Photonics, researchers at the University of Pennsylvania School of Engineering and Applied Science (Penn Engineering) describe the creation of a novel photonic switch that overcomes this size-speed tradeoff. And at just 85 by 85 micrometers, the new switch’s units are smaller than a grain of salt.

Scientists led by Tobias Kippenberg at EPFL have now achieved the long-sought goal: they successfully prepared six mechanical oscillators in a collective state, observed their quantum behavior, and measured phenomena that only emerge when oscillators act as a group. The research, published in Science, marks a significant step forward for quantum technologies, opening the door to large-scale quantum systems.

A new consortium consisting of ParityQC, DESY, eleQtron and the DLR Quantum Computing Initiative (DLR QCI) has successfully qualified for funding in the framework of the “Quantum Computing Funding Initiative” of the Hamburg Investment and Development Bank (IFB Hamburg). In the HQML (Hamburg Full Stack Quantum Machine Learning) project, the companies and DESY are working together with the DLR QCI to develop a full stack quantum solution for image data processing. The consortium will cover the entire chain of innovation, from the specific application field to the development of the required novel algorithms. This is unique in Hamburg so far, and HQML is one of the first projects of its kind in Germany and worldwide.

It has been proven, in the incredibly tiny quantum realm, by an international team co-led by UC Santa Cruz physicist Jairo Velasco, Jr. In a new paper published on November 27 in Nature, the researchers detail an experiment that confirms a theory first put forth 40 years ago stating that electrons confined in quantum space would move along common paths rather than producing a chaotic jumble of trajectories.

The best compact emitters of light are quantum dots—semiconductor nanocrystals with quantum mechanical behaviours thanks to their small size (2–10 nanometres). The emitted light goes in all directions and has poor polarisation, but placing it next to nanostructures enables directional emission or circular polarisation. Simultaneous control of both direction and polarisation, however, has never been achieved. In their paper “Unidirectional chiral emission via twisted bi-layer metasurfaces”, Associate Prof Wu and her team set out to bridge this gap.

A new study has uncovered important behavior in the flow of electric current through superconductors, potentially advancing the development of future technologies for controlled quantum information processing. The study is co-authored by Babak Seradjeh, Professor of Physics within the College of Arts and Sciences at Indiana University Bloomington, with theoretical physicists Rekha Kumari and Arijit Kundu of the Indian institute of Technology Kanpur. While the study is theoretical, the research team confirmed their results through numerical simulations. Published in Physical Review Letters, the world’s premier physics journal, the research focuses on “Floquet Majorana fermions” and their role in a phenomenon called the Josephson effect, which could lead to more precise control of the dynamics of driven quantum systems.

Researchers at the Paris Institute of Nanoscience at Sorbonne University have developed a new method to encode images into the quantum correlations of photon pairs, making it invisible to conventional imaging techniques. The study is published in the journal Physical Review Letters.

ICFO leads the first experimental demonstration of a deep subwavelength topological edge state within a nanophotonic system, a turnover in the field of topological Nanophotonics.