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Gateway for scientists


Here you will find current news from PTB's diverse research activities as well as a short guide to PTB.


lange Lebensdauer messen

Wenn ein angeregtes Atom schnell wieder in seinen Grundzustand zurückfällt, ist seine Lebensdauer verhältnismäßig leicht zu messen. Ganz anders, wenn das Atom lange im angeregten Zustand verweilt. Dann war sie bisher nur mit enormem Aufwand festzustellen. Jetzt haben Forschende aus der Physikalisch-Technischen Bundesanstalt (PTB) erstmals diese Messaufgabe gelöst. Mit einem völlig neuen experimentellen Ansatz hat das Team die Lebensdauer des ersten angeregten Zustands eines einzelnen Ytterbium-Ions zu 1,58(8) Jahren ermittelt. Das ist mehr als 6000-mal länger als die längste bisher gemessene Lebensdauer eines elektronischen Zustands. Die Methode, die das Team in der aktuellen Ausgabe von Physical Review Letters beschreibt, hat große Bedeutung für grundlegende Fragen der Atomphysik und die Entwicklung optischer Atomuhren.

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Advanced manufacturing (Symbolbild)

The production sector is the backbone of Europe’s industry with about 2 million companies and more than 30 million people working in this area. According to the EU, about half of all research funds are spent in this sector. There is certainly plenty of scope for research in this field: on the central challenges of digitalization and sustainability, for example. And metrological issues play a crucial role here too. To be able to bring together and promote metrological capacities, the European Association of National Metrology Institutes (EURAMET) has founded a European Metrology Network (EMN) for Advanced Manufacturing. Acting coordinator is Harald Bosse of the Physikalisch-Technische Bundesanstalt (PTB).

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Contact with colleagues

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Are you seeking contact with PTB scientists? Then in the chapter Opens internal link in current windowStructure & Divisions you can look up who is working in a suitable field of activity.

Research topics

The SI with its 7 base units
In the new International System of Units (SI), seven fundamental constants are determined as defining reference values. (Diagram: PTB)

An overview of the diverse research landscape of PTB as well as some particularly highlighted topics (for example, PTB research surrounding the International System of Units SI) you will find in the chapter Opens internal link in current windowResearch & Development). In addition, it is always worthwhile to look at the Opens internal link in current windowmain Homepage as well as the homepages of the respective Opens internal link in current windowDivisions. How reputable PTB is among researchers you can see at Opens internal link in current windowPTB in the World of Research. Furthermore, PTB has been – specifically its R&D component, in particular – evaluated repeatedly with excellent results. You can download the respective documents (which are in German only) in the right column as a pdf file.

Scientific publications

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In the database Opens internal link in current windowPTB-Publica you can search for scientific publications by PTB staff members. Furthermore, some divisions maintain their own overview lists on the publications of their staff members. These you will find via the respective Opens internal link in current windowhomepages of the divisions.

Research collaborations

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The many collaborations of the individual PTB divisions you will find in the Annual Report under the column Opens internal link in current windowFrom the Divisions. International collaborations of PTB, e.g. with other metrology institutes within the framework of the European Metrology Research Programme EMRP/EMPIR, you will find at Opens internal link in current windowInternational Affairs. Some current EMRP dates you will find in the current issue of Opens internal link in current windowPTB-News.

What PTB offers doctoral candidates

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PTB's broad range of offers for students, doctoral candidates, and also extending beyond the doctorate degree you will find in the chapter Opens internal link in current windowAbout Us & Careers.