Fachbereich Physik

Telescopes unite in unprecedented observations of a famous black hole

Astrophysicists of the University of Tübingen have been involved in a large, worldwide collaborative effort to observe the black hole M87 and its jet system all across the electromagnetic spectrum, during the observation campaign conducted with the Event Horizon Telescope that led to the first image of a black hole.

Neues Konzept für den Physik-Unterricht: Stromkreise besser verstehen

Physikdidaktiker der Goethe-Universität und der Universität Tübingen (Jun.-Prof. Dr. Jan-Philipp Burde) haben ein neues, intuitives Lehrkonzept entwickelt und in einer großen Vergleichsstudie an Schulen getestet.

 

Spiegel aus nur einer Atomlage

Beteiligung von Prof. Ch. Groß (Physikalisches Institut)

Versatile interfaces with strong and tunable light–matter interactions are essential for quantum science1 because they enable mapping of quantum properties between light and matter1. Recent studies210 have proposed a method of controlling light–matter interactions using the rich interplay of photon-mediated dipole–dipole interactions in structured subwavelength arrays of quantum emitters. However, a key aspect of this approach—the cooperative enhancement of the light–matter coupling strength and the directional mirror reflection of the incoming light using an array of quantum emitters—has not yet been experimentally demonstrated. Here we report the direct observation of the cooperative subradiant response of a two-dimensional square array of atoms in an optical lattice. We observe a spectral narrowing of the collective atomic response well below the quantum-limited decay of individual atoms into free space. Through spatially resolved spectroscopic measurements, we show that the array acts as an efficient mirror formed by a single monolayer of a few hundred atoms. By tuning the atom density in the array and changing the ordering of the particles, we are able to control the cooperative response of the array and elucidate the effect of the interplay of spatial order and dipolar interactions on the collective properties of the ensemble. Bloch oscillations of the atoms outside the array enable us to dynamically control the reflectivity of the atomic mirror. Our work demonstrates efficient optical metamaterial engineering based on structured ensembles of atoms4,8,9 and paves the way towards controlling many-body physics with light5,6,11 and light–matter interfaces at the single-quantum level.

Erster eROSITA all-sky survey abgeschlossen

Tiefer Blick in den Röntgenhimmel

eROSITA hat nach einem halben Jahr Survey-Betrieb nun seine erste vollständige Karte des Röntgenhimmels erstellt.
Die Karte wird am 24.6.2020 bei Astronomy Picture of the Day bei der NASA gezeigt

https://apod.nasa.gov/apod/ap200623.html
 

Neuer Ansatz auf dem Weg zum Quantencomputer

Übergroße Ionen machen Rechnen auf Quantenbasis zuverlässiger und schneller ‒ Tübinger Physiker an internationalem Forschungsprojekt beteiligt

Next round of Cluster Innovation Fund projects

In the 2019 call for new projects within the framework of the Cluster’s Innovation Funds, 6 new projects were now accepted for funding.

Alfried Krupp-Förderpreis für künftigen Tübinger Experimentalphysiker

Eine Million für Forschung zur Quantenphysik ‒ Dr. Christian Groß tritt im September eine Heisenberg-Professur in Tübingen an

Aktuell

21.02.2020

Scientists observe giant X-ray flare from a tiny star

Tübingen astrophysicist involved in the interpretation of a so far unique discovery

A star of about eight percent the Sun’s mass has been caught emitting an enormous ‘super flare’ of X-rays – a dramatic high-energy eruption that poses a fundamental problem for astronomers, who did not think it possible on stars that small.

See detailed press release:

https://uni-tuebingen.de/universitaet/aktuelles-und-publikationen/attempto-online/newsfullview-attempto/article/scientists-observe-giant-x-ray-flare-from-a-tiny-star/

Link to ESA press release:

http://www.esa.int/Science_Exploration/Space_Science/XMM-Newton_reveals_giant_flare_from_a_tiny_star

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