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Multiple choice
A first-order Trotter step for time
t
=
1.0
t = 1.0
t
=
1.0
has leading error bounded by
(
t
2
/
2
)
∥
[
A
,
B
]
∥
(t^2/2)\,\lVert[A,B]\rVert
(
t
2
/2
)
∥[
A
,
B
]∥
, where the commutator norm
∥
[
A
,
B
]
∥
=
2
\lVert[A,B]\rVert = 2
∥[
A
,
B
]∥
=
2
. What is this error bound?
2
4
0.5
1
Check answer