ffsim.UCJAnglesOpSpinBalanced¶

class ffsim.UCJAnglesOpSpinBalanced(norb, num_num_ansatz_ops, givens_ansatz_ops, final_givens_ansatz_op=None)[source]¶

Bases: SupportsApplyUnitary, SupportsApproximateEquality

A spin-balanced UCJ operator parameterized by gate rotation angles.

Methods

`from_parameters`(params, *, norb, n_reps, ...)	Initialize the UCJ operator from a real-valued parameter vector.
`from_t_amplitudes`(t2, *[, t1, n_reps, ...])	Initialize the UCJ operator from t2 (and optionally t1) amplitudes.
`from_ucj_op`(ucj_op)	Initialize the angles-based UCJ operator from a matrix-based UCJ operator.
`n_params`(norb, n_reps, ...[, ...])	Return the number of parameters of an ansatz with given settings.
`to_parameters`()	Convert the UCJ operator to a real-valued parameter vector.

static from_parameters(params, *, norb, n_reps, num_num_interaction_pairs, givens_interaction_pairs, with_final_givens_ansatz_op=False)[source]¶

Initialize the UCJ operator from a real-valued parameter vector.

Return type:: UCJAnglesOpSpinBalanced

static from_t_amplitudes(t2, *, t1=None, n_reps=None, interaction_pairs=None, tol=1e-08)[source]¶

Initialize the UCJ operator from t2 (and optionally t1) amplitudes.

Return type:: UCJAnglesOpSpinBalanced

static from_ucj_op(ucj_op)[source]¶

Initialize the angles-based UCJ operator from a matrix-based UCJ operator.

Return type:: UCJAnglesOpSpinBalanced

static n_params(norb, n_reps, num_num_interaction_pairs, givens_interaction_pairs, with_final_givens_ansatz_op=False)[source]¶

Return the number of parameters of an ansatz with given settings.

Return type:: int

to_parameters()[source]¶

Convert the UCJ operator to a real-valued parameter vector.

Return type:: ndarray

Attributes

`final_givens_ansatz_op`
`n_reps`	The number of ansatz repetitions.
`norb`
`num_num_ansatz_ops`
`givens_ansatz_ops`