Encodings
HamiltonianSkeleton Type
A precomputed encoding skeleton separating Pauli structure from integral coefficients.
Computing a qubit Hamiltonian has two independent parts:
Structure — which Pauli strings appear for each operator product (depends only on the encoding and system size). Coefficients — the integral values that scale each term (depends on the molecular geometry / parameters).
The skeleton captures part (1) once, then applyCoefficients
evaluates part (2) cheaply for any coefficient set. This is ideal for
potential energy surface scans where the basis set (and encoding
structure) is fixed but integral values vary with geometry.
Record fields
| Record Field |
Description
|
Full Usage:
NumQubits
Field type: uint32
|
Number of qubits in the system.
|
|
One-body entries: a†_i a_j encoded as Pauli strings.
|
|
Two-body entries: a†_i a†_j a_k a_l encoded as Pauli strings.
|