LayerModel
class LayerModel(L, H2, H1=None, cyclic=False)
Bases: LocalHam1D
A model for representing a layer of time-evolution interactions.
Essentially, this class is a simple wrapper of quimb.tensor.LocalHam1D. Its main purpose is to provide a simple interface for constructing a Quimb-compatible Hamiltonian from Qiskit objects.
Methods
from_quantum_circuit
classmethod from_quantum_circuit(circuit, *, keep_only_odd=None, **kwargs)
Construct a LayerModel from a QuantumCircuit.
You can see an example of this function in action in the docs of quimb_layers.
Parameters
- circuit (QuantumCircuit) – the quantum circuit to parse.
- keep_only_odd (bool | None) – whether to keep only interactions on bonds with odd indices.
- kwargs – any additional keyword arguments to pass to the
LayerModelconstructor.
Returns
A new LayerModel instance.
Raises
NotImplementedError – if an unsupported quantum gate is encountered.
Return type
get_gate_expm
get_gate_expm(where, x)
Get the local term at the sites where, matrix exponentiated by x.
Parameters
- where (tuple[int, int]) – the pair of site indices of the local term to get. This identifies the bond index.
- x (float) – the value with which to matrix exponentiate the interaction term.
Returns
The interaction in terms of an array or None if this layer has no interaction on this bond.
Return type
ndarray | None