Arthur Christianen

About me

I am a PhD student in theoretical physics, in the groups of Dr. Richard Schmidt and Prof. Ignacio Cirac.
My research is mostly focused on few-and many body phenomena in gases of ultracold atoms.
Research interests:

  • Quantum impurity problems, in particular the Bose polaron.
  • Cold and ultracold collisions of atoms and molecules.
  • Three-body physics and the Efimov effect.
  • Ultracold mixtures and the formation of molecules and clusters.
  • Variational methods, in particular Gaussian States.
  • Implementation of condensed matter models on a quantum computer or quantum simulator.

I started at the Max Planck Institute of Quantum Optics in October 2019. I am a PhD student shared between Dr. Schmidt and Prof. Cirac. Currently, my main research project focuses on the description of a quantum impurity in a Bose Einstein Condensate. Our goal is to find an approach that both incorporates the relevant few-body physics (for example the Efimov effect) and many-body physics (polaron cloud formation). To this end we use a Gaussian State variational Ansatz in the reference frame of the impurity.

Before joining the MPQ, I did my Master thesis in the Theoretical Chemistry group at the Radboud University in Nijmegen, in the group of Gerrit Groenenboom. Here I looked at collisions of cold and ultracold molecules. In particular, we proposed a model to explain the unexpected collisional loss of chemically stable bialkali molecules.

My publications can be found on my Google Scholar profile.

Contact information

Email: arthur(dot)christianen(at)mpq(dot)mpg(dot)de
Tel: (+ 49 89) 3 29 05 – 310
Room: B 1.42
Max-Planck-Institute of Quantum Optics
Hans-Kopfermann-Str. 1
85748 Garching, Germany