- #1
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Hi. I have come across the following equation
e^{A} e^{B} = e^{A+B} e ^{[A , B]/2}
where A and B are operators.
Is this the B-C-H formula or is it a version that only applies under specific conditions on the operators ?
Does this equation imply that e^{A+B} ≠ e^{B+A} ?
Thanks
e^{A} e^{B} = e^{A+B} e ^{[A , B]/2}
where A and B are operators.
Is this the B-C-H formula or is it a version that only applies under specific conditions on the operators ?
Does this equation imply that e^{A+B} ≠ e^{B+A} ?
Thanks