DeterminantString

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====== DeterminantString ======

###
DeterminantString(//Inds//,//NF//) creates a string of length //NF// and sets all characters to '0', except for those indices included in //Inds//, which it sets to '1'. This automatizes the input of functions like NewWavefunction or Eigensystem.
###

===== Input =====

  * //Inds// : A list of indices.
  * //NF// : The number of fermionic states (and hence the length of the resulting string).

===== Output =====

  * //Det// : A string that can be used as determinant input for wavefunctions, restrictions, or the like.

===== Example =====

###
A small example:
###

==== Input ====
<code Quanty Example.Quanty>
orbitals = {"H_1s","Fe_2s","Fe_2p","Fe_3s","Fe_3d"}
groupings = { {"H_states", {"H_1s"} }, {"Fe_states", {"Fe_2s","Fe_2p","Fe_3s","Fe_3d"}} }
Ind, NF = CreateAtomicIndicesDict(orbitals,groupings)

print("\nDeterminantString({0,1,2,3},NF):" )
print(DeterminantString({0,1,2,3},NF) )
print("\nDeterminantString(Ind[\"Fe_2p\"],NF):")
print(DeterminantString(Ind["Fe_2p"],NF) )
print("\nDeterminantString(Ind[\"H_states\"],NF):")
print(DeterminantString(Ind["H_states"],NF) )
print("\nDeterminantString(Ind[\"Fe_states\"],NF):")
print(DeterminantString(Ind["Fe_states"],NF) )

psi = NewWavefunction(NF,0,{{DeterminantString(Ind["Fe_3d"],NF) , 1}})
print(psi)
</code>

==== Result ====
<file Quanty_Output>
DeterminantString({0,1,2,3},NF):
1111000000000000000000

DeterminantString(Ind["Fe_2p"],NF):
0000111111000000000000

DeterminantString(Ind["H_states"],NF):
1100000000000000000000

DeterminantString(Ind["Fe_states"],NF):
0011111111111111111111

WaveFunction: Wave Function
QComplex         =          0 (Real==0 or Complex==1)
N                =          1 (Number of basis functions used to discribe psi)
NFermionic modes =         22 (Number of fermions in the one particle basis)
NBosonic modes   =          0 (Number of bosons in the one particle basis)

#      pre-factor         Determinant
   1   1.000000000000E+00       0000000000001111111111

</file>

===== Table of contents =====
{{indexmenu>.#1}}

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