Mainz 2026 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

Q: Fachverband Quantenoptik und Photonik

Q 42: Poster – Ultracold Matter (joint session Q/A)

Q 42.17: Poster

Wednesday, March 4, 2026, 17:00–19:00, Philo 2. OG

Phases of Matter in Few Fermions with Dipolar Interactions — •Tim Pohlmann, Ximeng Song, Paula Seyfert, Lennart Naeve, Lennart Hoenen, Philipp Lunt, and Lauriane Chomaz — Physikalisches Institut Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg

In this poster, we theoretically investigate few spin-polarized fermions with strong dipolar interactions in a two-dimensional harmonic trap. This project comes alongside of the construction of a new 161Dy experiment. We numerically find the ground states of the Hamiltonian by exact diagonalization for different particle numbers and various tilting angles of the dipoles. The competition of the dipolar interaction strength and directivity, Fermi energy and harmonic oscillator frequency results in a rich phase diagram[1]. This includes anisotropic pairing suggesting the emergence of p-wave superfluidity, and Wigner crystallization at large dipolar interactions[2, 3].
References: [1] Anne-Louise Gadsbølle and G. M. Bruun. Harmonically trapped dipolar fermions in a two-dimensional square lattice. Phys. Rev. A, 85:021604, Feb 2012. [2] G. M. Bruun and E. Taylor. Quantum phases of a two-dimensional dipolar fermi gas. Phys. Rev. Lett., 101:245301, Dec 2008. [3] J. C. Cremon et al. Tunable wigner states with dipolar atoms and molecules. Phys. Rev. Lett., 105:255301, Dec 2010.

Keywords: Fermions; Dipolar Interactions; Ultracold Dysprosium; Reduced Dimensions