@article{AzzaliGoetteSchick2015, author = {Azzali, Sara and Goette, Sebastian and Schick, Thomas}, title = {Large time limit and local L-2-index theorems for families}, series = {Journal of noncommutative geometry}, volume = {9}, journal = {Journal of noncommutative geometry}, number = {2}, publisher = {EMS Publ.}, address = {Z{\"u}rich}, issn = {1661-6952}, doi = {10.4171/JNCG/203}, pages = {621 -- 664}, year = {2015}, abstract = {We compute explicitly, and without any extra regularity assumptions, the large time limit of the fibrewise heat operator for Bismut-Lott type superconnections in the L-2-setting. This is motivated by index theory on certain non-compact spaces (families of manifolds with cocompact group action) where the convergence of the heat operator at large time implies refined L-2-index formulas. As applications, we prove a local L-2-index theorem for families of signature operators and an L-2-Bismut-Lott theorem, expressing the Becker-Gottlieb transfer of flat bundles in terms of Kamber-Tondeur classes. With slightly stronger regularity we obtain the respective refined versions: we construct L-2-eta forms and L-2-torsion forms as transgression forms.}, language = {en} }