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|
Canonicalizes an XX/YY/ZZ interaction by swap/negate/shift-ing axes.
cirq.linalg.kak_canonicalize_vector(
x: float,
y: float,
z: float,
atol: float = 1e-09
) -> cirq.linalg.KakDecomposition
Args | |
|---|---|
x
|
The strength of the XX interaction. |
y
|
The strength of the YY interaction. |
z
|
The strength of the ZZ interaction. |
atol
|
How close x2 must be to π/4 to guarantee z2 >= 0 |
Returns | |
|---|---|
| The canonicalized decomposition, with vector coefficients (x2, y2, z2) | |
satisfying
|
0 ≤ abs(z2) ≤ y2 ≤ x2 ≤ π/4
if x2 = π/4, z2 >= 0
Guarantees that the implied output matrix: g · (a1 ⊗ a0) · exp(i·(x2·XX + y2·YY + z2·ZZ)) · (b1 ⊗ b0) is approximately equal to the implied input matrix: exp(i·(x·XX + y·YY + z·ZZ)) |