Welcome to the Hensen Lab! We are a young dynamic experimental research group starting at the Leiden Institute of Physics.
Our lab addresses one of the key challenges of modern physics: understanding the interface between quantum mechanics and general relativity. Recently, an experimental test was proposed that can directly witness the need to unify the two theories: observing quantum entanglement between objects that only interact through the gravitational field. A successful test would prove the existence of superpositions of space-time and have far-reaching implications on how we understand our world.
We aim to develop and characterise an experimental platform that is compatible with the requirements for such a ‘entanglement through gravity’ experiment. The objectives of the research are to trap and levitate a picogram mass, cool its centre-of-mass motion to the quantum ground state, couple its motion to a controllable qubit system and produce and measure a spatial superpositions of the mass
We are looking for passionate new PhD students, Postdocs, and Master students to join the team (more info) !
We are grateful for funding from Leiden University, ERC starting grant, Quantum Delta NL, and the Dutch Organisation for Scientific Research, NWO.

23. Oct 2025
Super excited to get our Vidi project funded to study coupling our levitating magnets to spins in diamond! More here.
1. Sep 2025
Welcome to our new MSc student Balint Bosman!
28. Jul 2025
Check out our new preprint!
10. Jul 2023
We celebrated six succesful BSc thesis projects and Reinier’s MSc project with a layed back summer BBQ!
1. Feb 2025
Welcome to all our new BSc students!
1. Jan 2025
Welcome to our new postdoc M. Luisa Mattana!
12. Dec 2024
Finally got around to making a public repository for our code.
1. Oct 2024
Welcome to our new PhD student Eli van der Bent!
1. Sep 2024
Welcome to our new PhD student Richard Wagner & MSc student Julian van Doorn!