TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.4.123
TI  - Interaction quenches in Bose gases studied with a time-dependent hypernetted-chain Euler-Lagrange method
PY  - 2025/04/09
UR  - https://scipost.org/SciPostPhys.18.4.123
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 4
SP  - 123
A1  - Gartner, Mathias
AU  - Miesbauer, David
AU  - Kobler, Michael
AU  - Freund, Julia
AU  - Carleo, Giuseppe
AU  - Zillich, Robert
AB  - We present a new variational method to study the dynamics of a closed bosonic many-body system, the time-dependent hypernetted-chain Euler-Lagrange method, tHNC. Based on the Jastrow ansatz, it accounts for quantum fluctuations in a non-perturbative way. The tHNC method scales well with the number of dimensions, as demonstrated by our results on one-, two-, and three-dimensional systems. We apply the tHNC method to interaction quenches, i.e. sudden changes of the interaction strength, in homogeneous Bose gases. When the quench is strong enough that the final state has roton excitations (as found and predicted for dipolar and Rydberg-dressed Bose-Einstein condensates, respectively), the pair distribution function exhibits stable oscillations. For validation, we compare tHNC results with time-dependent variational Monte Carlo results in one and two dimensions.
ER  -

@Article{10.21468/SciPostPhys.18.4.123,
	title={{Interaction quenches in Bose gases studied with a time-dependent hypernetted-chain Euler-Lagrange method}},
	author={Mathias Gartner and David Miesbauer and Michael Kobler and Julia Freund and Giuseppe Carleo and Robert E. Zillich},
	journal={SciPost Phys.},
	volume={18},
	pages={123},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.4.123},
	url={https://scipost.org/10.21468/SciPostPhys.18.4.123},
}