hiro/two_qubit_model
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add j_normalized and use operator_norm function

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This commit is contained in:
Valentin Boettcher 2022-02-22 12:05:49 +01:00
parent 47e4a4ca86
commit e8d2e1a787
1 changed files with 17 additions and 5 deletions
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22
two_qubit_model.py
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@ -195,14 +195,22 @@ class TwoQubitModel:
return interaction
@property
def j_normalized(self) -> NDArray[np.float64]:
norm = operator_norm(self.bare_interaction)
if norm > 0:
return self.j / norm
return self.j
@property
def interaction(self) -> qt.Qobj:
"""The inter-qubit interaction hamiltonian."""
interaction = self.bare_interaction
norm = max(interaction.eigenenergies())
interaction *= self.γ / (2 * norm) if norm > 0 else 0
norm = operator_norm(interaction)
interaction *= float(self.γ) / (2 * norm) if norm > 0 else 0
return interaction
@ -216,9 +224,7 @@ class TwoQubitModel:
docstring.
"""
norm: float = (
np.sqrt(max(self.bare_interaction.eigenenergies())) if normalized else 1
)
norm: float = np.sqrt(operator_norm(self.bare_interaction)) if normalized else 1
j_vecs = []
q, r = np.linalg.qr(self.j)
@ -573,3 +579,9 @@ def _object_hook(dct: dict[str, Any]):
return StocProcTolerances(**dct["value"])
return dct
def operator_norm(obj: qt.Qobj) -> float:
"""Returns the operator norm of ``obj``."""
return np.sqrt(max(np.abs((obj.dag() * obj).eigenenergies())))