Physics – Mathematical Physics
Scientific paper
2009-07-31
Mathematical Problems in Engineering Volume 2009, Article ID 902506
Physics
Mathematical Physics
31 pages
Scientific paper
10.1155/2009/902506
Let $U_F$ be the Floquet operator of a time periodic hamiltonian $H(t)$. For each positive and discrete observable $A$ (which we call a {\em probe energy}), we derive a formula for the Laplace time average of its expectation value up to time $T$ in terms of its eigenvalues and Green functions at the circle of radius $e^{1/T}$. Some simple applications are provided which support its usefulness.
de Oliveira Cesar R.
Simsen Mariza S.
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