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alessandro-santini · Sep 21, 2022 · d5dc6ee · d5dc6ee
1 parent ef07e4f
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Showing 3 changed files with 3 additions and 2 deletions.
diff --git a/.gitignore b/.gitignore
@@ -1 +1,2 @@
 *.build_distribution
+.gitignore
diff --git a/TenNet/__pycache__/__init__.cpython-38.pyc b/TenNet/__pycache__/__init__.cpython-38.pyc
diff --git a/TenNet/spin_systems/Hamiltonians.py b/TenNet/spin_systems/Hamiltonians.py
@@ -40,9 +40,9 @@ def IsingChainWithAncilla(L, J=1., h_z=1., h_x=0.):
     Wbulk[0,0,:,:] = np.eye(4)
     Wbulk[1,0,:,:] = Xsys
     Wbulk[2,0,:,:] = Xanc
-    Wbulk[3,0,:,:] = -h_x*(Xsys+Xanc)-h_z*(Zsys+Zanc)
+    Wbulk[3,0,:,:] = -h_x*(Xsys-Xanc)-h_z*(Zsys-Zanc)
     Wbulk[3,1,:,:] = -J*Xsys
-    Wbulk[3,2,:,:] = -J*Xanc
+    Wbulk[3,2,:,:] = J*Xanc
     Wbulk[3,3,:,:] = np.eye(4)
 
     tensors[0]  = (Wbulk[-1,:,:,:].copy()).reshape(1,4,4,4)