Example #1
0
 def __init__(self, J, Jz, h, nsite):
     self.spaceconfig = SpinSpaceConfig([1, 2])
     I = OpUnitI(hndim=2)
     scfg = SpinSpaceConfig([1, 2])
     Sz = opunit_Sz(spaceconfig=scfg)
     Sp = opunit_Sp(spaceconfig=scfg)
     Sm = opunit_Sm(spaceconfig=scfg)
     wi = zeros((5, 5), dtype='O')
     wi[:, 0], wi[4, 1:] = (I, Sp, Sm, Sz,
                            -h * Sz), (J / 2. * Sm, J / 2. * Sp, Jz * Sz, I)
     WL = [copy.deepcopy(wi) for i in xrange(nsite)]
     WL[0] = WL[0][4:]
     WL[-1] = WL[-1][:, :1]
     self.H_serial = WL2OPC(WL)
Example #2
0
 def __init__(self,J,Jz,h,nsite):
     self.spaceconfig=SpinSpaceConfig([2,1])
     I=OpUnitI(hndim=2)
     scfg=SpinSpaceConfig([2,1])
     Sz=opunit_Sz(spaceconfig=scfg)
     Sp=opunit_Sp(spaceconfig=scfg)
     Sm=opunit_Sm(spaceconfig=scfg)
     wi=zeros((5,5),dtype='O')
     wi[:,0],wi[4,1:]=(I,Sp,Sm,Sz,-h*Sz),(J/2.*Sm,J/2.*Sp,Jz*Sz,I)
     WL=[copy.deepcopy(wi) for i in xrange(nsite)]
     WL[0]=WL[0][4:]
     WL[-1]=WL[-1][:,:1]
     self.H=MPO(WL)
     mpc=self.H.serialize()
     mpc.compactify()
     self.H_serial=mpc
Example #3
0
 def __init__(self,J,Jz,D,nsite):
     self.spaceconfig=SpinSpaceConfig([3,1])
     self.J,self.Jz,self.D,self.nsite=J,Jz,D,nsite
     I=OpUnitI(hndim=self.spaceconfig.hndim)
     Sz=opunit_Sz(spaceconfig=self.spaceconfig)
     Sp=opunit_Sp(spaceconfig=self.spaceconfig)
     Sm=opunit_Sm(spaceconfig=self.spaceconfig)
     wi=zeros((5,5),dtype='O')
     wi[:,0],wi[4,1:]=(I,Sp,Sm,Sz,D*Sz*Sz),(J/2.*Sm,J/2.*Sp,Jz*Sz,I)
     WL=[copy.deepcopy(wi) for i in xrange(nsite)]
     WL[0]=WL[0][4:]
     WL[-1]=WL[-1][:,:1]
     self.H=MPO(WL)
     mpc=self.H.serialize()
     mpc.compactify()
     self.H_serial=mpc
     ion()
     cla()
     mpc.show_advanced()
     pdb.set_trace()