openfermion.linalg.expectation

Compute the expectation value of an operator with a state.

Main aliases

openfermion.linalg.expectation(
    operator, state
)

Used in the tutorials
Circuits 2: Linear Trotter steps of diagonal Coulomb operators Quantum simulation of electronic structure

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. If `operator` is a LinearOperator, then this must be a numpy array.

Returns
A complex number giving the expectation value.

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 2022-10-26 UTC.

Args