corrupt_bitstring_probs

pyquil.noise.corrupt_bitstring_probs(p, assignment_probabilities)

Given a 2d array of true bitstring probabilities (outer axis iterates over shots, inner axis over bits) and a list of assignment probability matrices (one for each bit in the readout, ordered like the inner axis of results) compute the corrupted probabilities.

Parameters:

• p (np.array) – An array that enumerates bitstring probabilities. When flattened out p = [p_00...0, p_00...1, ...,p_11...1]. The total number of elements must therefore be a power of 2. The canonical shape has a separate axis for each qubit, such that p[i,j,...,k] gives the estimated probability of bitstring ij...k.
• assignment_probabilities (List[np.array]) –

  A list of assignment probability matrices per qubit. Each assignment probability matrix is expected to be of the form:

  [[p00 p01]
   [p10 p11]]
  

Returns:

p_corrected an array with as many dimensions as there are qubits that contains the noisy-readout-corrected estimated probabilities for each measured bitstring, i.e., p[i,j,...,k] gives the estimated probability of bitstring ij...k.

Return type:

np.array