Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Stimming, Hans Peter"'
Publikováno v:
Journal of Computational Physics 493, 112431 (2023)
"Generalized Hydrodynamics" (GHD) stands for a model that describes one-dimensional \textit{integrable} systems in quantum physics, such as ultra-cold atoms or spin chains. Mathematically, GHD corresponds to nonlinear equations of kinetic type, where
Externí odkaz:
http://arxiv.org/abs/2212.12349
Autor:
Mennemann, Jan-Frederik, Mazets, Igor E., Pigneur, Marine, Stimming, Hans Peter, Mauser, Norbert J., Schmiedmayer, Jörg, Erne, Sebastian
Publikováno v:
Phys. Rev. Research 3, 023197 (2021)
We present a detailed analysis of the relaxation dynamics in an extended bosonic Josephson junction. We show that stochastic classical field simulations using Gross-Pitaevskii equations in three spatial dimensions reproduce the main experimental find
Externí odkaz:
http://arxiv.org/abs/2012.05885
Autor:
Møller, Frederik, Li, Chen, Mazets, Igor, Stimming, Hans-Peter, Zhou, Tianwei, Zhu, Zijie, Chen, Xuzong, Schmiedmayer, Jörg
Publikováno v:
Phys. Rev. Lett. 126, 090602 (2021)
In an effort to address integrability breaking in cold gas experiments, we extend the integrable hydrodynamics of the 1d Lieb-Liniger model with two additional components representing the population of atoms in the first and second transverse excited
Externí odkaz:
http://arxiv.org/abs/2006.08577
We analyze a numerical method to solve the time-dependent linear Pauli equation in three space dimensions. The Pauli equation is a semi-relativistic generalization of the Schr\"odinger equation for 2-spinors which accounts both for magnetic fields an
Externí odkaz:
http://arxiv.org/abs/2005.06072
Autor:
Li, Chen, Zhou, Tianwei, Mazets, Igor, Stimming, Hans-Peter, Møller, Frederik S., Zhu, Zijie, Zhai, Yueyang, Xiong, Wei, Zhou, Xiaoji, Chen, Xuzong, Schmiedmayer, Jörg
Publikováno v:
SciPost Phys. 9, 058 (2020)
We study ultra-cold bosons out of equilibrium in a one-dimensional (1D) setting and probe the breaking of integrability and the resulting relaxation at the onset of the crossover from one to three dimensions. In a quantum Newton's cradle type experim
Externí odkaz:
http://arxiv.org/abs/1804.01969
Publikováno v:
Computational Methods in Applied Mathematics; Jul2024, Vol. 24 Issue 3, p797-812, 16p
Publikováno v:
Optica 3, 725 (2016)
Nonlinear optical phenomena are typically local. Here we predict the possibility of highly nonlocal optical nonlinearities for light propagating in atomic media trapped near a nano-waveguide, where long-range interactions between the atoms can be tai
Externí odkaz:
http://arxiv.org/abs/1412.8331
We propose an efficient and accurate solver for the nonlocal potential in the Davey-Stewartson equation using nonuniform FFT (NUFFT). A discontinuity in the Fourier transform of the nonlocal potential causes accuracy locking if the potential is solve
Externí odkaz:
http://arxiv.org/abs/1409.2014
Autor:
Exl, Lukas, Bance, Simon, Reichel, Franz, Schrefl, Thomas, Stimming, Hans Peter, Mauser, Norbert J.
Publikováno v:
J. Appl. Phys. 115, 17D118 (2014)
We present a steepest descent energy minimization scheme for micromagnetics. The method searches on a curve that lies on the sphere which keeps the magnitude of the magnetization vector constant. The step size is selected according to a modified Barz
Externí odkaz:
http://arxiv.org/abs/1309.5796
Autor:
Exl, Lukas, Abert, Claas, Mauser, Norbert J., Schrefl, Thomas, Stimming, Hans Peter, Suess, Dieter
Publikováno v:
Math. Models Methods Appl. Sci. 24 (2014) 1877-1901
We derive a Kronecker product approximation for the micromagnetic long range interactions in a collocation framework by means of separable sinc quadrature. Evaluation of this operator for structured tensors (Canonical format, Tucker format, Tensor Tr
Externí odkaz:
http://arxiv.org/abs/1212.3509