Steven Hoekstra


I am an experimental physicist specialised in the development and application of precision measurement techniques to explore the limits of particle physics. In my group we perform experiments with small quantum systems (atoms, ions, molecules) and nanoparticles. The main tools we use to study these particles are lasers, and external electric and magnetic fields. The experiments we do are typically in a very well controlled environment, shielded from all unwanted background. By doing this, the subtle effects of quantum physics become visible, and we can use these atoms, ions, molecules and nanoparticles for a range of exciting experiments. 
There are currently various possibilities for master research projects in my group. Also, there are a number of openings for PhD positions, and postdocs in this academic year.  Contact me if you are interest to talk about possibilities!



Our research program to measure the electron's electric dipole moment using a cold, slow and intense beam of BaF molecules

Levitated nanospheres

We optically levitate and cool nanospheres, to explore their use as sensitive sensors.


Novel spin-precession method for sensitive EDM searches

A. Boeschoten, V. R. Marshall, T. B. Meijknecht, A. Touwen, H. L. Bethlem, A. Borschevsky, S. Hoekstra, J. W. F. van Hofslot, K. Jungmann, M. C. Mooij, R. G. E. Timmermans, W. Ubachs, L. Willmann

arXiv:2303.06402, 2023

Opportunities for Fundamental Physics Research with Radioactive Molecules

Gordon Arrowsmith-Kron, Michail Athanasakis-Kaklamanakis, Mia Au, Jochen Ballof, Robert Berger, Anastasia Borschevsky, Alexander A. Breier, Fritz Buchinger, Dmitry Budker, Luke Caldwell, Christopher Charles, Nike Dattani, Ruben P. de Groote, David DeMille, Timo Dickel, Jacek Dobaczewski, Christoph E. Düllmann, Ephraim Eliav, Jon Engel, Mingyu Fan, Victor Flambaum, Kieran T. Flanagan, Alyssa Gaiser, Ronald Garcia Ruiz, Konstantin Gaul, Thomas F. Giesen, Jacinda Ginges, Alexander Gottberg, Gerald Gwinner, Reinhard Heinke, Steven Hoekstra, Jason D. Holt, Nicholas R. Hutzler, Andrew Jayich, Jonas Karthein, Kyle G. Leach, Kirk Madison, Stephan Malbrunot-Ettenauer, Takayuki Miyagi, Iain D. Moore, Scott Moroch, Petr Navrátil, Witold Nazarewicz, Gerda Neyens, Eric Norrgard, Nicholas Nusgart, Lukáš F. Pašteka, Alexander N. Petrov, Wolfgang Plass, Roy A. Ready, Moritz Pascal Reiter, Mikael Reponen, Sebastian Rothe, Marianna Safronova, Christoph Scheidenberger, Andrea Shindler, Jaideep T. Singh, Leonid V. Skripnikov, Anatoly V. Titov, Silviu-Marian Udrescu, Shane G. Wilkins, Xiaofei Yang

ArXiv, 2023, pp. arXiv:2302.02165

Impacts of Problem-Based Instruction on Students’ Beliefs about Physics and Learning Physics

May Lee, Cormac Larkin, Steven Hoekstra

Education Sciences, vol. 13, 2023, p. 321

Electric dipole moments and the search for new physics

Ricardo Alarcon, et al

arXiv:2203.08103, 2022

Benchmarking of the Fock-space coupled-cluster method and uncertainty estimation: Magnetic hyperfine interaction in the excited state of BaF

The NL-eEDM collaboration:, Malika Denis, Pi A B Haase, Maarten C Mooij, Yuly Chamorro, Parul Aggarwal, Hendrick L Bethlem, Alexander Boeschoten, Anastasia Borschevsky, Kevin Esajas, Yongliang Hao, Steven Hoekstra, Joost W F van Hofslot, Virginia R Marshall, Thomas B Meijknecht, Rob G E Timmermans, Anno Touwen, Wim Ubachs, Lorenz Willmann, Yanning Yin

Physical Review A, vol. 105(5), 2022, p. 052811

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Electricity and Magnetism

1st year physics, applied physics and astronomy

~340 students

Waves and Optics

2nd year physics, applied physics and astronomy

~190 students

From small to large to life

~25 students, twice a year.



Our work in the media

Our work in the media


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