I am interested in several topics that correspond to the subject of the 
workshop.
1. Charging effects in granular materials.
The Coulomb interction is very important in granular materials because 
it can lead to the coulomb blockade. Changing the amplitude of the 
tunnelling of electrond from grain to grain one can come to both metal 
and insulator. A critical value of the intergranular conductance exists 
and this is the critical point of the quantum phase transition. There 
are experimental indications that some underdoped cuprates may have a 
granular structure, which makes this type of systems especially interesting.

2. Odd triplet superconductivity in superconductor-ferromagnet 
structures. This topic is related to one of popular questions at the 
workshop concerning a coexistance of the ferromagnetism with 
unconventional superconductivity. We are able to demonstrate that an odd 
triplet superconductivity can be generated by a non-homogeneous exchange 
field from the conventional singlet superconductivity.

3. I am also interested in in studying non-trivial effects in an 
electron system with a repulsion between the electrons. There are 
interesting  corrections to thermodynamical quantities that are not 
present in the Landau theory of the Fermi liquid. We are developing 
(with I. Aleiner) a new method based on quasiclassical Green functions 
that allows us to avoid complicated diagrammatic calculations. We 
investigate a possibility of non-trivial phase transitions in such systems.