Researchers from the University of Stuttgart and from the Institut d’optique in Palaiseau have explored a unique state of matter, a so-called topological phase. Such a topologicial phase is the ground state of a quantum many-body system and exhibits unique properties. The collaboration between the group of Prof. Hans Peter Büchler in Stuttgart and the group of Prof. Antoine Browaeys in Palaiseau have for the first time observed such a phase in a quantum simulator, where the state of matter is realised in a well controlled enviroment and allows for the study of the unique properties. The research results are published in 1st August in Science.
Most states of matter are characterized by the concept of spontaneous symmetry breaking, e.g., the periodic arrangement of atoms in a solid breaks the translational symmetry, or Ferromagnets with all the magnetic moments pointing into the same direction break the rotational symmetry.
However, not all states of matter fall into this paradigm, and especially so-called topologcal phases can not be characterized by a broken symmetry. Examples in condensed matter are the integer as well as the fractional quantum Hall state, and topological insulators.
In the present publiaction, such a topological phase was realized in artificial matter consisting of up to 14 individually trapped atoms excited into Rydberg states. The strong interaction between the Rydberg states gives rise to a quantum many-body system, whose ground state is determined by a topological phase.
Due to the high control in such an artifical setup over the individual atoms, the unique properties of the topological phase could be direclty probed and observed such as the existence of robust edge states, a characteristic gapped excitation spectrum, as well as the appearance of a string order parameter.
The experimental observations performed within the group of Prof. Antoine Browaeys in Palaiseau are in exzellent agreement with the theoretical expectations analyzed by the group of Prof. Hans Peter Büchler in Stuttgart.
Hans Peter Büchler is professor in theoretical physics and head of the institute for theoretical physics III at the University of Stuttgart. This research on quantum many-body systems in artificial matter and the realization of topolgocal phases is funded by the European Research Council within the ERC project SIRPOL.
Furthermore, this research question is also part of the EU flagship on quantum technologies under the aspect of quantum simulators. The research is performed within a strong collaboration bewteen the theoretical group at the University of Stuttgart and the experimental group lead by Prof. Antoine Browaeys at the Institut d’optique in Palaiseau.
The research results are published in 1st August in Science online as first release:
Prof. Hans Peter Büchler, Head of the institute for theoretical physics III at the University of Stuttgart, 0711 685 64975, firstname.lastname@example.org
Andrea Mayer-Grenu | idw - Informationsdienst Wissenschaft
Moon glows brighter than sun in images from NASA's Fermi
16.08.2019 | NASA/Goddard Space Flight Center
Tiny lensless endoscope captures 3D images of objects smaller than a cell
16.08.2019 | The Optical Society
Soft robots have a distinct advantage over their rigid forebears: they can adapt to complex environments, handle fragile objects and interact safely with humans. Made from silicone, rubber or other stretchable polymers, they are ideal for use in rehabilitation exoskeletons and robotic clothing. Soft bio-inspired robots could one day be deployed to explore remote or dangerous environments.
Most soft robots are actuated by rigid, noisy pumps that push fluids into the machines' moving parts. Because they are connected to these bulky pumps by tubes,...
Researchers at TU Graz are working together with European partners on new possibilities of measuring vehicle emissions.
Today, air pollution is one of the biggest challenges facing European cities. As part of the Horizon 2020 research project CARES (City Air Remote Emission...
Over the next three years, researchers from the Vrije Universiteit Brussel, University of Cambridge, École Supérieure de Physique et de Chimie Industrielles de la ville de Paris (ESPCI-Paris) and Empa will be working together with the Dutch Polymer manufacturer SupraPolix on the next generation of robots: (soft) robots that ‘feel pain’ and heal themselves. The partners can count on 3 million Euro in support from the European Commission.
Soon robots will not only be found in factories and laboratories, but will be assisting us in our immediate environment. They will help us in the household, to...
Scientists at the University of Leeds have created a new form of gold which is just two atoms thick - the thinnest unsupported gold ever created.
The researchers measured the thickness of the gold to be 0.47 nanometres - that is one million times thinner than a human finger nail. The material is regarded...
An international team of scientists involving the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg has unraveled the light-induced electron-localization dynamics in transition metals at the attosecond timescale. The team investigated for the first time the many-body electron dynamics in transition metals before thermalization sets in. Their work has now appeared in Nature Physics.
The researchers from ETH Zurich (Switzerland), the MPSD (Germany), the Center for Computational Sciences of University of Tsukuba (Japan) and the Center for...
14.08.2019 | Event News
12.08.2019 | Event News
12.08.2019 | Event News
16.08.2019 | Life Sciences
16.08.2019 | Life Sciences
16.08.2019 | Ecology, The Environment and Conservation