openfermion.circuits.trotter_operator_grouping

Trotter-decomposes operators into groups without exponentiating.

Main aliases

openfermion.circuits.trotter_operator_grouping(
    hamiltonian,
    trotter_number=1,
    trotter_order=1,
    term_ordering=None,
    k_exp=1.0
)

Operators are still Hermitian at the end of this method but have been multiplied by k_exp.

Note
The default term_ordering is simply the ordered keys of the QubitOperators.terms dict.

Args
`hamiltonian`	`QubitOperator` full hamiltonian
`trotter_number`	`int` optional number of trotter steps - default is 1
`trotter_order`	`int` optional order of trotterization as an integer from 1-3 - default is 1
`term_ordering`	`list of (tuples of tuples` optional list of QubitOperator terms dictionary keys that specifies order of terms when trotterizing
`k_exp`	`float` optional exponential factor to all terms when trotterizing

Yields
QubitOperator generator

Raises
ValueError if order > 3 or order <= 0, TypeError for incorrect types

Note