Research

Please note: Time flies when having fun. As I ease my way into retirement, I am no longer taking students or postdocs under my supervision.

My research activity has focused on theoretical studies of quantum many-body problems of relevance to Condensed Matter and Statistical Physics. 

This encompasses a wide variety of rather diverse physical systems, such as Helium and Hydrogen at very high pressure, as well as quantum antiferromagnets. 

The main theme of this research effort has been the understanding of the microscopic origin of such physical phenomena as Bose condensation, superfluidity and  superconductivity.

These subjects have intrigued theoretical and experimental physicists for almost a century, but much remains to be discovered and understood. 

For example, the relationship between superfluidity and Bose Condensation, the mechanism underlying high-temperature superconductivity, are only two of the many research topics for which new ideas and contributions would be welcome indeed.

For most of these problems, traditional approximate perturbative methods prove often inadequate, due to the strong renormalization caused by interactions. 

The past two decades have witnessed the development of a new and powerful theoretical approach, fostered by impressive progress of computer technology. 

The basic idea is that of formulating the many-body problem in a way suitable for a computer to solve exactly, i.e., with no approximation. 

A variety of computational methods have been developed in recent years, with notable success for a variety of such many-body problems.

I have made use of, and developed novel techniques, based on Computer Simulations, to investigate the macroscopic (thermodynamic) properties of these systems, and attempt to connect them to their microscopic physics.