Atominstitut
Neutron- and Quantum Physics
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Novel Quantum Effect Found: Spin-Rotation Coupling
It was predicted 30 years ago, now the effect was measured for the first time by scientists at TU Wien (Vienna): The neutron spin exhibits inertial effects. Mehr
Geht das nicht genauer?
Das Motto der Naturwissenschaft: Was man messen kann, messen. Was man nicht messen kann, messbar machen. Und was man schon gemessen hat, noch einmal exakter messen. Mehr
Helmut Rauch - ein Nachruf
Die TU Wien, die Fakultät für Physik und das Atominstitut trauern um Professor Emeritus Dipl.-Ing. Dr.techn. Helmut Rauch. Mehr
Correspondence Artikel in Nature published to honor the 50th birthday of the ultracold neutrons
To honor this occasion, a famous birthday song has been composed again, using ultracold neutrons in a gravitational field. Mehr
Probing of violation of Lorentz invariance by ultracold neutrons intheStandard Model Extension
We analyze a dynamics of ultracold neutrons (UCNs) caused by interactions violating Lorentz invariance within the Standard Model Extension (SME) (Colladay and Kostelecký (1997) and Kostelecký (2004)). We use the effective non–relativistic potential for interactions violating Lorentz invariance derived by Kostelecký and Lane (1999) and calculate contributions of these interactions to the transition frequencies of transitions between quantum gravitational states of UCNs bouncing in the gravitational field of the Earth. Using the experimental sensitivity of qBounce experiments we make some estimates of upper bounds of parameters of Lorentz invariance violation in the neutron sector of the SME which can serve as a theoretical basis for an experimental analysis. We show that an experimental analysis of transition frequencies of transitions between quantum gravitational states of unpolarized and polarized UCNs should allow to place some new constraints in comparison to the results adduced by Kostelecký and Russell (2011). Mehr
Measuring the Laws of Nature
A physical constant, which is of great importance for basic research, has now be re-measured, with much higher precision than ever before. Mehr
The Conundrum of the Decaying Neutron
Can dark matter be created when neutrons transform into protons? This is a hotly debated theory – but new analyses from TU Wien do not support this idea. Mehr
Workshop on Matter-Wave Interferometry
The 2nd Informal Workshop on Matter-Wave Interferometry was held in the beautiful city of Vienna on Thursday May 23th and Friday 24th 2019 at the Atominstitut. Mehr
Atominstitut wird zur "EPS Historic Site" erhoben
Die European Physical Society erklärt das Institut nun zum Ort besonderer wissenschaftshistorischer Bedeutung – bei einem Festsymposium zu Ehren von Helmut Rauch. Mehr
No sign of Symmetrons
A high-precision experiment led by TU Wien has set its sights on pinpointing the so-far hypothetical "symmetron fields" using the PF2 ultra-cold neutron source at the Institut Laue-Langevin in France. For the existence of symmetrons could provide an explanation for the mysterious dark energy. Mehr
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