forked from SunnySuite/Sunny.jl
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Squashed commits from previous fork
- Loading branch information
Showing
1 changed file
with
98 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,98 @@ | ||
# Test LT | ||
import Pkg | ||
Pkg.activate("C:\\Users\\hlane34\\.julia\\dev\\Sunny.jl") #step needed until we add to dependences properly | ||
|
||
using Sunny | ||
|
||
################################################################################ | ||
# Model | ||
################################################################################ | ||
begin | ||
a, b, c = 1.0, 2.0, 3.0 | ||
latvecs = lattice_vectors(a, b, c, 90, 90, 90) | ||
# positions = [[0,0,0],[0,0,0.1]] | ||
positions = [[0,0,0]] | ||
cryst = Crystal(latvecs, positions, 1) | ||
|
||
dims = (1,1,1) | ||
S1 = 1 | ||
S2 = 1 | ||
sys = System(cryst, dims, [SpinInfo(1; S=S1, g=1)], :dipole) | ||
|
||
J = -1.0 | ||
D = 0.3 | ||
h = 0 | ||
|
||
|
||
J₁= [J 0 0; | ||
0 J D; | ||
0 -D J]; | ||
|
||
|
||
J₂=0.0*J₁ | ||
J₃=0.0*J₁ | ||
μ = -0.2 | ||
|
||
set_exchange!(sys, J₁, Bond(1, 1, [-1,0,0])) | ||
# set_exchange!(sys, J₂, Bond(1, 2, [0,0,0])) | ||
# set_exchange!(sys, J₃, Bond(2, 2, [-1,0,0])) | ||
set_external_field!(sys, [0.0, 0.0, h]) | ||
S = spin_operators(sys, 1) | ||
set_onsite_coupling!(sys, -μ*S[3]^2, 1) | ||
|
||
|
||
end | ||
################################################################################ | ||
# Find ground state | ||
################################################################################ | ||
begin | ||
Δt = 0.02 | ||
λ = 0.1 | ||
langevin = Langevin(Δt; kT=0, λ) | ||
|
||
randomize_spins!(sys) | ||
for kT in range(5, 0, 30_000) | ||
langevin.kT = kT | ||
step!(sys, langevin) | ||
end | ||
|
||
end | ||
langevin.kT = 0.0 | ||
for _ ∈ 1:20_000 | ||
step!(sys, langevin) | ||
end | ||
|
||
################################################################################ | ||
# Calculate SWT | ||
################################################################################ | ||
print_wrapped_intensities(sys) | ||
|
||
q_opt, val, vect = Sunny.Min_Q(sys) | ||
atan(-D/J) | ||
-(q_opt[1][1]-1)*2*pi # picked up a degenerate wavevector so we need to do some work! | ||
@assert round(atan(-D/J),digits=6) ≈ round(-(q_opt[1][1]-1)*2*pi,digits=6) | ||
# check this transformation is legit: | ||
@assert abs(Sunny.lambda_min(sys,[-(q_opt[1][1]-1),0,0],1)[1]-Sunny.lambda_min(sys,q_opt[1],1)[1]) < 1e-7 | ||
|
||
#################################################################### | ||
|
||
Evals = fill(zeros(ComplexF64,3), length(unique_els)) | ||
Qs, Energies, EigV = Sunny.Min_Q(sys) | ||
Qvectors, Evals = Sunny.suggest_initial_parameters(sys) | ||
L=8 | ||
|
||
@time res, vectors, minim=Sunny.optimize_fourier_components(sys,Qvectors,L,Evals,1000.0;iterations = 5) | ||
|
||
T=Sunny.build_empty_T_matrix(Qvectors,L) | ||
unique_els = Sunny.get_unique_elements(T,L) | ||
empty_list = fill(zeros(ComplexF64,length(initial_guess[1])),length(unique_els)) | ||
init_dict = Dict(zip(unique_els,empty_list)) | ||
dims = Tuple([length(unique_els)]) | ||
for q=1:length(Primary_Qs) | ||
address= zeros(Int64,length(Primary_Qs)) | ||
address[q]=1 | ||
init_dict[Tuple(address)]=initial_guess[q] | ||
end | ||
Sunny.update_T_matrix!(T,init_dict) | ||
|
||
Sunny.ℒ(sys,Qvectors,L,T,0.0) |