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17 lines
517 B
Fortran
17 lines
517 B
Fortran
subroutine apply_mono(i_hole,i_particle,ispin_excit,key_in,Nint)
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implicit none
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integer, intent(in) :: i_hole,i_particle,ispin_excit,Nint
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integer(bit_kind), intent(inout) :: key_in(Nint,2)
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integer :: k,j
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use bitmasks
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! hole
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k = ishft(i_hole-1,-bit_kind_shift)+1
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j = i_hole-ishft(k-1,bit_kind_shift)-1
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key_in(k,ispin_excit) = ibclr(key_in(k,ispin_excit),j)
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k = ishft(i_particle-1,-bit_kind_shift)+1
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j = i_particle-ishft(k-1,bit_kind_shift)-1
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key_in(k,ispin_excit) = ibset(key_in(k,ispin_excit),j)
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end
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