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qiskit.quantum_info.shannon_entropy

shannon_entropy(pvec, base=2)[Quellcode]

Compute the Shannon entropy of a probability vector.

The shannon entropy of a probability vector \(\vec{p} = [p_0, ..., p_{n-1}]\) is defined as

\[H(\vec{p}) = \sum_{i=0}^{n-1} p_i \log_b(p_i)\]

where \(b\) is the log base and (default 2), and \(0 \log_b(0) \equiv 0\).

Parameter
  • pvec (array_like) – a probability vector.

  • base (int) – the base of the logarithm [Default: 2].

Rückgabe

The Shannon entropy H(pvec).

Rückgabetyp

float

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