DA

Diploma thesis in physics ETH Zurich

Purpose

This repository comprises the source code used to simulate kicked Bose-Einstein condensates trapped in a lattice with harmonic potential wells. I specifically is used to examine behaviour of the governing Gross-Pitaevskii equation on specific Kick strengths. The non-linearity implies the validity of the KAM theory of classical chaos theory.

At the time it was thought that this gives rise to chaotic behaviour in the quantum realm

Installation Requirements

In order to be able to compile the file in this repository, you will need to have the following installed:

A working C++ compiler with the standard library
A working Fortran compiler if you are installing fftw from scratch.
The Boost extension to the standard library. This can be obtained via your pakage manager, homebrew if you are on mac or simply here
Lapack and BLAS: Installation and usage docs founr here
The [Fastest Fourier Transform in the West] (https://www.fftw.org/) Library

Note: Some of the files make use of a library called IETL (the Iterative Eigensolver Template Library). To the best of my knowledge, it is no longer under active development or has been merged into some other project. To solve the Gross-Pitaevskii equation however, it is not needed, so most of the programs here will compile.

Also, I am in the process of converting some of the makefiles to cmake, which should make it easier to compile modern C/C++

Name		Name	Last commit message	Last commit date
Latest commit History 11 Commits
cmake-tests		cmake-tests
headers		headers
oldcode		oldcode
scripts		scripts
tests		tests
text		text
.gitignore		.gitignore
BEC_Energy.cpp		BEC_Energy.cpp
BEC_Groundstate.cpp		BEC_Groundstate.cpp
BEC_Groundstate_imt.cpp		BEC_Groundstate_imt.cpp
BEC_Harmonic.cpp		BEC_Harmonic.cpp
BEC_Harmonic_GS_imag_time.cpp		BEC_Harmonic_GS_imag_time.cpp
BEC_Stefan.cpp		BEC_Stefan.cpp
BEC_harm_lattice_1kick.cpp		BEC_harm_lattice_1kick.cpp
BEC_harm_lattice_kick.cpp		BEC_harm_lattice_kick.cpp
BEC_harm_lattice_kick1.cpp		BEC_harm_lattice_kick1.cpp
BEC_harm_lattice_nokick.cpp		BEC_harm_lattice_nokick.cpp
BEC_harm_lattice_nokick_new.cpp		BEC_harm_lattice_nokick_new.cpp
BEC_kick1.cpp		BEC_kick1.cpp
BEC_kick_mom.cpp		BEC_kick_mom.cpp
BEC_momentum.cpp		BEC_momentum.cpp
BEC_partry.cpp		BEC_partry.cpp
BEC_ring_period_kick.cpp		BEC_ring_period_kick.cpp
BEC_ring_period_kick1.cpp		BEC_ring_period_kick1.cpp
BEC_rint_p_kick_t^3_scheme.cpp		BEC_rint_p_kick_t^3_scheme.cpp
BEC_try.cpp		BEC_try.cpp
CMakeLists.txt		CMakeLists.txt
LICENSE		LICENSE
Mean_BEC_momentum.cpp		Mean_BEC_momentum.cpp
Mean_BEC_momentum_dist.cpp		Mean_BEC_momentum_dist.cpp
Mean_BEC_momentum_dist_nola.cpp		Mean_BEC_momentum_dist_nola.cpp
Mean_BEC_momentum_dist_nothing.cpp		Mean_BEC_momentum_dist_nothing.cpp
Mean_BEC_momentum_dist_notrap.cpp		Mean_BEC_momentum_dist_notrap.cpp
Mean_BEC_momentum_distdiv.cpp		Mean_BEC_momentum_distdiv.cpp
Mean_BEC_momentum_distmod.cpp		Mean_BEC_momentum_distmod.cpp
Mean_BEC_momentum_distmod_nola.cpp		Mean_BEC_momentum_distmod_nola.cpp
Mean_BEC_momentum_distmod_nothing.cpp		Mean_BEC_momentum_distmod_nothing.cpp
Mean_BEC_momentum_distmod_notrap.cpp		Mean_BEC_momentum_distmod_notrap.cpp
Mean_BEC_momentum_distmod_test.cpp		Mean_BEC_momentum_distmod_test.cpp
Mean_BEC_momentum_exp.cpp		Mean_BEC_momentum_exp.cpp
Mean_BEC_momentum_exp_late.cpp		Mean_BEC_momentum_exp_late.cpp
Mean_BEC_momentum_exp_nola.cpp		Mean_BEC_momentum_exp_nola.cpp
Mean_BEC_momentum_exp_nola_late.cpp		Mean_BEC_momentum_exp_nola_late.cpp
Mean_BEC_momentum_exp_nothing.cpp		Mean_BEC_momentum_exp_nothing.cpp
Mean_BEC_momentum_exp_nothing_late.cpp		Mean_BEC_momentum_exp_nothing_late.cpp
Mean_BEC_momentum_exp_notrap.cpp		Mean_BEC_momentum_exp_notrap.cpp
Mean_BEC_momentum_exp_notrap_late.cpp		Mean_BEC_momentum_exp_notrap_late.cpp
Potential.cpp		Potential.cpp
README.md		README.md
energytest.cpp		energytest.cpp
fft.cpp		fft.cpp
functortest.cpp		functortest.cpp
gauss.cpp		gauss.cpp
leg.cpp		leg.cpp
legendre.cpp		legendre.cpp
matrix.cpp		matrix.cpp
scalapack.c		scalapack.c

License

thomi137/DA

Folders and files

Latest commit

History

Repository files navigation

DA

Purpose

Installation Requirements

About

Topics

Resources

License

Stars

Watchers

Forks

Languages