With the help of ultrafast lasers, Dutch researcher Anouk Wetzels from the FOM Institute for Atomic and Molecular Physics has visualised the wave function of slow electrons. The wave function describes how the electron moves around the nucleus of an atom. With this it is possible to directly visualise atomic and even molecular wave functions.
Wetzels used light pulses with a duration of a millionth of a millionth of a second to visualise the wave function of electrons in atoms. With these rapid pulses the physicist specifically kicked electrons out of an atom. A special technique called velocity map imaging was then used to visualise the speed distribution of the electrons. This resulted in a direct measurement of the wave function of an electron in a Rydberg atom.
In Rydberg atoms the outermost electron is so slow that the orbiting time is longer than the duration of an ultrafast light pulse. As a result of this, the interaction between the pulse, which consists of just half a wavelength, and the electron can be seen as a ’kick’. The result of the kick depends on the location and speed of the electron in its orbit around the nucleus. By kicking the electron in the direction of the detector, the speeds of the electrons perpendicular to the detector remain unchanged.
Nalinie Moerlie | EurekAlert!
Molecule flash mob
19.01.2017 | Technische Universität Wien
Magnetic moment of a single antiproton determined with greatest precision ever
19.01.2017 | Johannes Gutenberg-Universität Mainz
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
19.01.2017 | Earth Sciences
19.01.2017 | Life Sciences
19.01.2017 | Physics and Astronomy