# cirq.linalg.pow_pauli_combination

Computes non-negative integer power of single-qubit Pauli combination.

Returns scalar coefficients bi, bx, by, bz such that

``````bi I + bx X + by Y + bz Z = (ai I + ax X + ay Y + az Z)^exponent
``````

Correctness of the formulas below follows from the binomial expansion and the fact that for any real or complex vector (ax, ay, az) and any non-negative integer k:

`````` [ax X + ay Y + az Z]^(2k) = (ax^2 + ay^2 + az^2)^k I
``````
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