Adiabatic theorems for general linear operators with time-dependent domains

Abstract

We establish adiabatic theorems with and without spectral gap condition for general -- typically dissipative -- linear operators $A(t):D(A(t))\subset X\to X$ with time-dependent domains $D(A(t))$ in some Banach space $X$. In these theorems, we do not require the considered spectral values $\hat{I}»(t)$ of $A(t)$ to be (weakly) semisimple. We then apply our general theorems to the special case of skew-adjoint operators $A(t)=1/i{A}_{a(t)}$ defined by symmetric sesquilinear forms $a(t)$ and thus generalize, in a very simple way, the only adiabatic theorem for operators with time-dependent domains known so far.

33 pages, 3 figures. Correction of some typos, expansion of some proofs, update of references. arXiv admin note: substantial text overlap with arXiv:1401.0089, arXiv:1804.11213