3 papers
cond-mat.quant-gas2025
Ab initio Complex Langevin computation of the roton gap for a dipolar Bose condensate
Philipp Heinen, Wyatt Kirkby, Lauriane Chomaz +1
We compute from first principles the dispersion relation of a dipolar Bose gas of erbium atoms close to the roton instability by employing the Complex Langevin (CL) algorit…
cond-mat.quant-gas2024
Simulation of ultracold Bose gases with the complex Langevin method
Philipp Heinen
This PhD thesis gives a comprehensive treatment of ab initio lattice Monte Carlo simulations of ultracold Bose gases by means of the complex Langevin algorithm. Since the field-the…
cond-mat.quant-gas2024
Simulating the Berezinskii-Kosterlitz-Thouless Transition with Complex Langevin
Philipp Heinen, Thomas Gasenzer
Numerical simulations of the full quantum properties of interacting many-body systems by means of field-theoretic Monte-Carlo techniques are often limited due to a sign problem. He…