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documentation:language_reference:functions:newwavefunction [2022/09/30 06:23] – Maurits W. Haverkortdocumentation:language_reference:functions:newwavefunction [2022/09/30 16:02] – Elmar Bittner
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 ### ###
-//NewWavefunction(Nf, Nb, DeterminantTable)// creates a wave-function with $Nf$ fermions and $Nb$ bosons as a sum over determinants given by the determinant table. Determinant Table is of the form of a string of 1's and 0's followed by a prefactor, for example: //{{"100000",math.sqrt(1/2)}, ...}//. NewWavefunction can take a forth element specifying options.+//NewWavefunction(Nf, Nb, DeterminantTable)// creates a wave-function with $Nf$ fermions and $Nb$ bosons as a sum over determinants given by the determinant table. Determinant Table is of the form of a string of 1's and 0's followed by a prefactor, for example: //{ {"100000",math.sqrt(1/2)}, ...}//. NewWavefunction can take a forth element specifying options.
 ### ###
 +
 +===== Input =====
 +
 +  * Nf : Integer
 +  * Nb : Integer
 +  * Determinant Table : Table of tables containing the determinant in terms of 1's and 0's specifying occupied and unoccupied Fermions followed by a real or complex prefactor.
 +  * Possible options are
 +    * "Name" a string specifying the name of the wavefunction
 +    * "NBitsKey" a list of integers specifying the number of bits in the key used for the hash lookup tables. For optimal performance 2<sup>NBitsKey</sup> should be about 1.5 times larger than the maximum number of determinants encountered in the wavefunction.
 + 
 +
 +===== Output =====
 +
 +  * psi : Wavefunction
 +
 +===== Example =====
 +
 +###
 +description text
 +###
 +
 +==== Input ====
 +<code Quanty NewWavefunction.Quanty>
 +Nf=6
 +Nb=0
 +
 +psi0=NewWavefunction(Nf, Nb, { { "100000",math.sqrt(1/2)}, {"000001",math.sqrt(1/2)} } )
 +
 +print(psi0)
 +</code>
 +
 +==== Result ====
 +<file Quanty_Output NewWavefunction.out>
 +WaveFunction: Wave Function
 +QComplex         =          0 (Real==0 or Complex==1)
 +N                =          2 (Number of basis functions used to discribe psi)
 +NFermionic modes =          6 (Number of fermions in the one particle basis)
 +NBosonic modes   =          0 (Number of bosons in the one particle basis)
 +
 +#      pre-factor         Determinant
 +   1   7.071067811865E-01       100000
 +   2   7.071067811865E-01       000001
 +</file>
 +
 +===== Table of contents =====
 +
 +{{indexmenu>.#1}}

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