pygsti.tools.symplectic.colsum

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pygsti.tools.symplectic.colsum#

colsum(i, j, s, p, n)#

A helper routine used for manipulating stabilizer state representations.

Updates the i-th stabilizer generator (column of s and element of p) with the group-action product of the j-th and the i-th generators, i.e.

generator[i] -> generator[j] + generator[i]

Parameters:

  • i (int) – Destination generator index.

  • j (int) – Sournce generator index.

  • s (numpy array) – The matrix over the integers mod 2 representing the stabilizer state

  • p (numpy array) – The ‘phase vector’ over the integers mod 4 representing the stabilizer state

  • n (int) – The number of qubits. s must be shape (2n,2n) and p must be length 2n.

Return type:

None

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