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The coolest experiments in the world - The world of ultra-low temperatures

Begin: End: Location: Lecture Hall Building II, Lecture Hall 1 and 2
Event type:
  • Brötchen-und-Borussia
Marc Aßmann and Jörg Debus observe a cool experiment. © TU Dortmund

Lecture in the series "Brötchen und Borussia" by Prof. Dr. Marc Aßmann and Dr. Jörg Debus (TU Dortmund)

The coolest experiments in the world -  The world of ultra-low temperatures

The village of Oimjakon in Siberia is considered the coldest inhabited place on Earth, with temperatures as low as -67.8°C. Although this temperature seems extremely low to us, it is almost extremely warm when viewed on a cosmic scale: In space itself, temperatures of -270.4°C prevail. In the world of ultracold physics, exciting phenomena occur that are completely unknown to us in everyday life: Substances take on completely new states of aggregation, electricity flows without electrical resistance, and objects suddenly begin to float. To reach this world, researchers realize temperatures that are up to 10 million times colder than space. In the lecture, we explain what this specification actually means, how such temperatures can be achieved, why the world behaves so unfamiliarly at this extreme cold, and why we all exploit ultra-low temperatures every day with our smartphones. Plus, of course, we'll demonstrate the coolest experiments in the world live in the lecture hall.

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The campus of the Technical University of Dortmund is located near the freeway junction Dortmund West, where the Sauerland line A45 crosses the Ruhr expressway B1/A40. The Dortmund-Eichlinghofen exit on the A45 leads to the South Campus, the Dortmund-Dorstfeld exit on the A40 leads to the North Campus. The university is signposted at both exits.

The "Dortmund Universität" S-Bahn station is located directly on the North Campus. From there, the S-Bahn line S1 runs every 20 or 30 minutes to Dortmund main station and in the opposite direction to Düsseldorf main station via Bochum, Essen and Duisburg. In addition, the university can be reached by bus lines 445, 447 and 462. Timetable information can be found on the homepage of the Rhine-Ruhr transport association, and DSW21 also offer an interactive route network map.



One of the landmarks of the TU Dortmund is the H-Bahn. Line 1 runs every 10 minutes between Dortmund Eichlinghofen and the Technology Center via Campus South and Dortmund University S, while Line 2 commutes every 5 minutes between Campus North and Campus South. It covers this distance in two minutes.



From Dortmund Airport, it takes just over 20 minutes to get to Dortmund Central Station by AirportExpress and from there to the university by S-Bahn. A wider range of international flight connections is offered by Düsseldorf Airport, about 60 kilometers away, which can be reached directly by S-Bahn from the university's train station.

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The facilities of TU Dortmund University are spread over two campuses, the larger Campus North and the smaller Campus South. Additionally, some areas of the university are located in the adjacent "Technologiepark".

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