From 7dd9969a12c04fffcc5e9399b6c386a849268501 Mon Sep 17 00:00:00 2001
From: Christoph Groth <christoph.groth@cea.fr>
Date: Thu, 21 Feb 2013 18:11:44 +0100
Subject: [PATCH] tutorial: use default value for magnetic field
---
doc/source/images/closed_system.py.diff | 2 +-
doc/source/tutorial/closed_system.py | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/doc/source/images/closed_system.py.diff b/doc/source/images/closed_system.py.diff
index 928c356d..7f7340d8 100644
--- a/doc/source/images/closed_system.py.diff
+++ b/doc/source/images/closed_system.py.diff
@@ -35,7 +35,7 @@
+ size = (_defs.figwidth_in, _defs.figwidth_in)
+
# Calculate the wave functions in the system.
- ham_mat = sys.hamiltonian_submatrix(sparse=True, kwargs={'B': 0})
+ ham_mat = sys.hamiltonian_submatrix(sparse=True)
evecs = sla.eigsh(ham_mat, k=20, which='SM')[1]
# Plot the probability density of the 10th eigenmode.
diff --git a/doc/source/tutorial/closed_system.py b/doc/source/tutorial/closed_system.py
index e98861a8..d67c2899 100644
--- a/doc/source/tutorial/closed_system.py
+++ b/doc/source/tutorial/closed_system.py
@@ -36,7 +36,7 @@ def make_system(a=1, t=1.0, r=10):
rsq = x ** 2 + y ** 2
return rsq < r ** 2
- def hopx(site1, site2, B):
+ def hopx(site1, site2, B=0):
# The magnetic field is controlled by the parameter B
y = site1.pos[1]
return -t * exp(-1j * B * y)
@@ -81,7 +81,7 @@ def plot_spectrum(sys, Bfields):
#HIDDEN_BEGIN_wave
def plot_wave_function(sys):
# Calculate the wave functions in the system.
- ham_mat = sys.hamiltonian_submatrix(sparse=True, kwargs={'B': 0})
+ ham_mat = sys.hamiltonian_submatrix(sparse=True)
evecs = sla.eigsh(ham_mat, k=20, which='SM')[1]
# Plot the probability density of the 10th eigenmode.
--
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