Hubert J. Jóźwiak, Ph.D.

I’m a theoretical and computational physicist with a focus on spectroscopy and collisional dynamics. I use first-principles quantum scattering calculations to investigate collisions and interactions between simple atoms and molecules. The goal of my work is to provide ultra-accurate theoretical data that supports high-precision experiments and contributes to astrophysical and atmospheric models.

Please explore my research interests below or get in touch via email.

Research areas

Collisions & Line Shapes

Quantum dynamics of molecular collisions and their effect on spectroscopic line shapes for astrophysical and atmospheric applications. Learn more →

Hyperfine Structure

Theoretical determination of the hyperfine structure in molecular hydrogen and its isotopologues for tests of fundamental physics. Learn more →

Cold & Ultracold Collisions

Investigating quantum dynamics at low temperatures and in external fields, paving the way for trapping and sympathetic cooling of molecular hydrogen. Learn more →

News

March 2026 I am honored to have been awarded the Marie Skłodowska-Curie Actions (MSCA) Postdoctoral Fellowship! Press (PL)

March 2026 Our paper on cavity-enhanced spectroscopy in the deep cryogenic regime has been published in Nature Physics! It was a pleasure to contribute to this work. Press (PL) Press (EN) News & Views

January 2026 I was awarded the Bekker Fellowship by the Polish National Agency for Academic Exchange (NAWA) to conduct research abroad. Press (PL)

November 2025 I was awarded the 1st prize in the PhD Contest 2025 for the best PhD thesis utilizing the resources of the AGH Cyfronet computer center! Press

November 2025 Our paper on Letokhov-Chebotayev Intracavity Trapping Spectroscopy of H₂ has been published in Physical Review Letters! It was a pleasure to contribute to this work. Press (PL) Press (EN) Physics

October 2025 I started a new position as a Postdoctoral Research Associate in Tijs Karman’s group at Radboud University (Nijmegen, NL).

June 2025 I’m excited to start a new position as a Postdoctoral Research Associate at Nicolaus Copernicus University, continuing my work within the ERC Starting Grant H2TRAP project.

May 2025 I successfully defended my PhD thesis, Collisions of simple molecules and atoms in fundamental studies, and was awarded the degree with honors from Nicolaus Copernicus University.

March 2025 Our paper on dispersive heterodyne cavity ring-down spectroscopy has been published in Science Advances! It was a pleasure to contribute to this work. Press (PL)

January 2025 I’m thrilled to begin my new research project as a Principal Investigator on the Collisional effects in exotic atom spectroscopy project funded by the National Science Center in Poland through the PRELUDIUM program. Press (PL) Popular abstract (PL)

July 2024 I was honored to be selected as a Lindau Alumnus and participated in the 73rd Lindau Nobel Laureate Meeting. A fantastic experience! Press (PL)