openfermion.linalg.variance

Compute variance of operator with a state.

Main aliases

openfermion.linalg.variance(
    operator, state
)

Args
`operator`	`scipy.sparse.spmatrix or scipy.sparse.linalg.LinearOperator` The operator whose expectation value is desired.
`state`	`numpy.ndarray or scipy.sparse.spmatrix` A numpy array representing a pure state or a sparse matrix representing a density matrix.

Args

operator

scipy.sparse.spmatrix or scipy.sparse.linalg.LinearOperator

The operator whose expectation value is desired.

state

numpy.ndarray or scipy.sparse.spmatrix

A numpy array representing a pure state or a sparse matrix representing a density matrix.

Returns
A complex number giving the variance.

Raises
`ValueError`	Input state has invalid format.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2023-06-08 UTC.