项目介绍

2024年10月24日

Your function

We are looking for a motivated PhD student, with a degree in physics or physical chemistry and with experience in atomic/molecular/optical physics and/or molecular spectroscopy, who wishes to work with us in the international and stimulating environment of the joint Quantum Metrology group at LaserLaB Amsterdam.

This project aims to measure the level structure of weakly-bound molecular states of H₂⁺ with unprecedented accuracy using novel quantum technologies. These transitions in the microwave and THz range are particularly sensitive to the proton-to-electron mass ratio (m_p/m_e) and exotic spin-dependent interactions. For this, you will be involved in developing a novel cryogenic ion trap for quantum-logic spectroscopy using H₂⁺ (spectroscopy) and Be⁺ (logic) ions. You will develop a continuous-wave laser system at 313nm to laser cool Be⁺ ions, which are then used for sympathetic cooling of the molecular ions. The molecular ions are selectively prepared by field-ionizing the optically excited molecular Rydberg states of H₂ (we use extreme-UV light at 90nm, UV and visible laser light). To guide the experimental developments and understand the measured spectra, you will dive into the details of the molecular Hamiltonian, advanced angular momentum theory, optical Bloch equations, laser cooling simulations, and many other topics.

During the PhD, you will engage with various aspects of molecular spectroscopy and experimental physics, including cryogenics, ultrahigh vacuum, CAD design, optics and lasers, electronics, and scientific programming. There is also the possibility of delving into the theory of molecular Rydberg states, photoionization, and photodissociation using multichannel quantum-defect theory.

Your profile

• Bachelor/Master in physics or physical chemistry
• Affinity for quantum mechanics and atomic/molecular/optical physics.
• Most important is that you are bright, enthusiastic, work well in a team, are eager to learn, and of course that you are enthusiastic about this intriguing project! 

As a university, we strive for equal opportunities for all, recognizing that diversity takes many forms. We believe that diversity in all its complexity is invaluable for the quality of our teaching, research, and service. We are always looking for talent with diverse backgrounds and experiences. This also means that we are committed to creating an inclusive community so that we can use diversity as an asset.

We realize that each individual brings a unique set of skills, expertise, and mindset. Therefore we are happy to invite anyone who recognises themselves in the profile to apply, even if you do not meet all the requirements.