Scientists at the Johannes Gutenberg University Mainz have, for the first time, succeeded in rendering the spatial distribution of individual atoms in a Bose-Einstein condensate visible. Bose-Einstein condensates are small, ultracold gas clouds which, due to their low temperatures, can no longer be described in terms of traditional physics but must be described using the laws of quantum mechanics. The first Bose-Einstein condensates were generated in 1995 by Eric A. Cornell, Carl E. Wieman and Wolfgang Ketterle, who received the Nobel Prize in Physics for their work only six years later. Since then, these unique gas clouds, the coldest objects humans ever created, have become a global research object.
Physicists working with Dr Herwig Ott in the study group for quantum, atomic and neutron physics (QUANTUM) at Mainz University have now developed a new tech-nology that can be used to plot the individual atoms in a Bose-Einstein condensate. In addition, the spatial resolution achieved during plotting far exceeds any previous methods used. The research results of the Emmy Noether Independent Junior Research Group, sponsored by the German Research Foundation (DFG), were published in the professional journal Nature Physics under the title of "High-resolution scanning electron microscopy of an ultracold quantum gas".
This breakthrough was possible due to the use of a high-resolution scanning elec-tron microscope that makes use of a very fine electron beam to scan the ultracold atomic cloud, thus rendering even the smallest structures visible. "The transfer of this technology to ultracold gases was a technical risk," reports Dr Herwig Ott, head of the Emmy Noether Junior Research Group, "as two different techniques had to be combined." Moreover, atoms and molecules move completely freely and ran-domly in gases unlike they do in solids. Another advantage of this highly advanced microscopy process is the better spatial resolution compared with optical processes where the resolution capacity is limited by the wavelength of the light used. "With a resolution of 150 nm, we are able to view these quantum objects with an accuracy that is 10 times higher than has been possible to date," explains Ott.
As electron microscopy made previously unknown parts of our world visible to the viewer, so the technology developed in Mainz has opened up unique possibilities for investigating the microscopic structure of quantum gases. The physicists in Mainz have already reached their first major milestone: They managed to make the structure of a so-called optical lattice visible. Optical lattices are interference patterns comprised of laser beams, which are shone onto the atomic cloud and force their periodic structure onto it. This results in the creation of crystal-like formations. The interesting aspect is that the movement of the atoms in an optical lattice within a quantum gas is similar to the behavior of electrons in solid bodies. Quantum gases are thus able to simulate the physical properties of solid bodies and can therefore also contribute to answering outstanding questions in solid-state physics.
Petra Giegerich | alfa
http://www.quantum.physik.uni-mainz.de/ ; http://www.nature.com/doifinder/10.1038/nphys1102
When fluid flows almost as fast as light -- with quantum rotation
22.06.2018 | The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
Thermal Radiation from Tiny Particles
22.06.2018 | Universität Greifswald
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
22.06.2018 | Materials Sciences
22.06.2018 | Earth Sciences
22.06.2018 | Life Sciences