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Tim Langen @timlangen.bsky.social · 1d

Now published back-to-back in @apsphysics.bsky.social's Phys. Rev. A:

journals.aps.org/pra/abstract...
journals.aps.org/pra/abstract...

High-resolution spectroscopy of barium monofluoride: Odd isotopologues, hyperfine structure, and isotope shifts

Barium monofluoride (BaF) is a promising molecular species for precision tests of fundamental symmetries and interactions. We present a combined theoretical and experimental study of BaF spectra and i...

journals.aps.org

Tim Langen @timlangen.bsky.social · 4d

Now published in Phys. Rev. Lett.

journals.aps.org/prl/abstract...

Self-Bound Superfluid Membranes and Monolayer Crystals of Ultracold Polar Molecules

We investigate the physics of ultracold dipolar molecules using path-integral quantum Monte Carlo simulations, and construct the complete phase diagram extending from weak to strong interactions and f...

journals.aps.org

Tim Langen @timlangen.bsky.social · Sep 4

🚀 Great success! Three 🇪🇺 #ERC Starting Grants this year go to @tuwien.at — including one for Andreas Schindewolf from my group! 🎉

Proud moment for our team and a big congratulations to Andreas and all other awardees!

@erc.europa.eu | #VCQ | Quantum Science Austria | #quantum #ERCStartingGrant

TU Wien @tuwien.at · Sep 4

Dreifacher Erfolg für die TU Wien: Drei spannende Projekte wurden vom European Research Council mit einem ERC Starting Grant gefördert. Wir freuen uns darauf!

Drei ERC-Grants für die TU Wien

Riesenerfolg bei der diesjährigen Vergabe der ERC Starting Grants: Mit Uros Delic, Gerben Oling und Andreas Schindewolf starten gleich drei Preisträger große Projekte an der TU Wien.

www.tuwien.at

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Tim Langen @timlangen.bsky.social · Jun 30

Inspiring discussions on nuclear symmetry breaking, #PrecisionMeasurements, and how #ColdMolecules can help probe #PhysicsBeyondTheStandardModel. Grateful to the organizers for bringing together such an excellent group of researchers.

Talks are online here: 🔗 esnt.cea.fr/Phocea/Page/...

Symmetry-violating nuclear properties

L'Espace de Structure et de réactions nucléaires théoriques est une entité sans chercheur permanent, financée conjointement par la DSM et la DAM dans le but de favoriser l'activité scientifique entre...

esnt.cea.fr

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Tim Langen @timlangen.bsky.social · Jun 30

Recently had the pleasure of giving an invited talk at the ESNT Workshop on "Theoretical and experimental developments for symmetry-violating nuclear properties" at @cea.fr Saclay!

@tuwien.at | @fwf-at.bsky.social | #quantum

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Tim Langen @timlangen.bsky.social · Jun 30

A new PhD graduate from the Cold Molecules group! Huge congratulations to Felix Kogel for successfully defending his PhD with the highest distinction! Felix's doctoral hat includes an interactive replica of the #lasercooling experiment for new types of #precisionmeasurements described in his thesis!

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Tim Langen @timlangen.bsky.social · Jun 27

Fantastic workshop on Ultracold Molecules at Warsaw University, organized by Simon Cornish and @michaltomza.bsky.social! Greatly enjoyed joining as a speaker and panelist - amazing talks & discussions, and a real sense that #molecules are one of the most exciting areas of quantum science today!

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Tim Langen @timlangen.bsky.social · Jun 20

Check out the invited session P02 "Advances in cooling atoms and molecules" for our latest work on the laser cooling of complex #molecules!

schedule.aps.org/damop/2025/e...

#pacificnorthwest #volcanoes

Advances in Cooling Atoms and Molecules

America/Los_Angeles -- 10:30 am – 12:00 pm, Thursday June 19, Session P02, Oregon Convention Center, Portland Ballroom 251

schedule.aps.org

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Tim Langen @timlangen.bsky.social · Jun 20

My timelines are usually filled with pictures of either #quantum physics or mountains. What a unique opportunity to combine them both!

Approaching @apsphysics.bsky.social's #DAMOP2025 meeting in Portland, flying in right over the crater rim of Mt. St. Helens, with Mt. Adams in the background.

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Tim Langen @timlangen.bsky.social · Jun 17

Two new preprints with colleagues from @rug.nl, @uchicagopsd.bsky.social and @jhu.edu

arxiv.org/pdf/2506.10940
arxiv.org/abs/2506.12972

#quantum | @tuwien.at

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Tim Langen @timlangen.bsky.social · Jun 17

Barium charge radii in molecules do the (odd-even) twist: High-resolution spectroscopy of barium monofluoride that benchmarks theory, reveals nuclear properties and prepares the molecules for more efficient laser cooling along the way.

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Tim Langen @timlangen.bsky.social · May 22

Now published in @apsphysics.bsky.social Phys. Rev. Research: journals.aps.org/prresearch/a...

Laser-cooled $^{137}\mathrm{BaF}$ molecules for measuring nuclear-spin-dependent parity violation

Many precision measurements with molecules require species that possess additional nuclear spin, but laser cooling such systems is challenging because of their complex hyperfine structure. This work d...

journals.aps.org

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Tim Langen @timlangen.bsky.social · May 6

Now published in NJP: iopscience.iop.org/article/10.1...

Molecular laser cooling using serrodynes: implementation, characterization and prospects - IOPscienceSearch

Molecular laser cooling using serrodynes: implementation, characterization and prospects, Kogel, Felix, Garg, Tatsam, Rockenhäuser, Marian, Morales-Ramírez, Sebastián A, Langen, Tim

iopscience.iop.org

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Tim Langen @timlangen.bsky.social · Apr 9

Das Ganze gibt es hier zum freien PDF Download, demnächst auch zusammen mit weiterführenden Video-Materialien:

physik-erkenntnisse-perspektiven.de

Es lassen sich dort auch kostenlose Printexemplare (z.B. für Schulen) bestellen.

Physik: Erkenntnisse und Perspektiven

physik-erkenntnisse-perspektiven.de

Tim Langen @timlangen.bsky.social · Apr 9

Ich habe kürzlich zu zwei Artikeln im neuen Sammelband "Physik: Erkenntnisse und Perspektiven" der Deutsche Physikalische Gesellschaft beigetragen. Darin fassen über 200 Physikerinnen und Physiker gemeinsam viele faszinierenden Aspekte der modernen #Physik zusammen.

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Tim Langen @timlangen.bsky.social · Apr 6

Thank you to everyone who joined, especially Rektor Jens Schneider.

Tim Langen @timlangen.bsky.social · Apr 6

I recently had the honor of delivering my official inaugural lecture as a professor at @tuwien.at. It was a fantastic opportunity to share my group’s research in #quantum science and technology and connect with colleagues, students, and friends.

I'm excited for what lies ahead!

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Tim Langen @timlangen.bsky.social · Apr 4

Great collaboration with the group of Thomas Pohl within the Cluster of Excellence Quantum Science Austria at Technische Universität Wien! #quantum

Self-bound monolayer crystals of ultracold polar molecules

We investigate the physics of ultracold dipolar molecules using path-integral quantum Monte Carlo simulations, and construct the complete phase diagram extending from weak to strong interactions and f...

arxiv.org

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Tim Langen @timlangen.bsky.social · Apr 4

New crystal morphologies for #dipolar quantum matter

Dipolar atoms and molecules naturally self-assemble into droplet crystals, but did you know these #droplets can further transition into flawless monolayer crystals when interactions become strong enough?

See here: arxiv.org/abs/2504.02682

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Tim Langen @timlangen.bsky.social · Feb 4

Now published in @apsphysics.bsky.social Phys. Rev. Lett.

journals.aps.org/prl/abstract...

Dipolar Droplets of Strongly Interacting Molecules

We simulate a molecular Bose-Einstein condensate in the strongly dipolar regime, observing the existence of self-bound droplets, as well as their splitting into multiple droplets by confinement-induce...

journals.aps.org

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Tim Langen @timlangen.bsky.social · Jan 28

Two levels are great for qubits, but molecules can take it to the next level—currently 112 of them, to be exact.

We've controlled this complexity to realize laser cooling of previously intractable 137BaF molecules, preparing them for sensitive tests of the Standard Model.

arxiv.org/abs/2501.16095

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Tim Langen @timlangen.bsky.social · Jan 22

Less is more: how to optimize the laser light for the laser cooling of complex molecules.

arxiv.org/abs/2501.10725

First new preprint of 2025!

#coldmolecules #quantum #lessismore #serrodynes

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Tim Langen @timlangen.bsky.social · Jan 14

Enjoying a morning walk to teach my lecture at TU Wien's Master’s program in #Quantum Information Science and Technology.

No, this is not the lecture hall - but it's only a short walk away.

Join us next semester!

For details, see here: informatics.tuwien.ac.at/master/quant...

#fuTUrefit

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Tim Langen @timlangen.bsky.social · Jan 7

aspenphys.org/summer-works...

Deadline for applications is January 31, 2025.

Please repost!

Summer Workshops - Aspen Center for Physics

aspenphys.org

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Tim Langen @timlangen.bsky.social · Jan 7

Together with Tanya Zelevinsky, Sebastian Will and Tijs Karman we are organizing a summer workshop on Cold #Molecules for Fundamental Physics and Many-Body #Quantum Science at Aspen Center For Physics.

Join us to learn about and contribute to the latest developments in this exciting field!

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