densitytensor_to_measured_densitytensor

qujax.densitytensor_to_measured_densitytensor(densitytensor, qubit_inds, measurement)

Returns the post-measurement densitytensor assuming that qubit_inds are measured (in the computational basis) and the given measurement (integer or bitstring) is observed.

Parameters:

• densitytensor (ndarray) – Input densitytensor.

• qubit_inds (Sequence[int]) – Sequence of qubit indices to measure.

• measurement (int | ndarray) – Observed integer or bitstring.

Returns:

Post-measurement densitytensor (same shape as input densitytensor).

Return type:

ndarray