Research Projects at the LTP

Quantum Field Theory

One of the jobs of physicists is to study the forces of nature. Electrical forces hold the atoms together to form crystals and other forms of matter, gravity guides the motion of the planets, while the weak and strong forces are responsible for nuclear power and hold the key to understand the origin of the sunlight and the evolution of stars. Quantum Field Theory is the framework for the study of the forces and fields of nature, from a quantum mechanical perspective, at the fundamental level. Its methods are the routine working tools of theoretical high energy physicists.

High Energy Physics

High Energy Physics is concerned with the study of the fundamental constituents of matter (the so called elementary particles) and their fundamental interactions. There is a fundamental reason why high energies are needed for research in this area. First, the elementary particles are the smallest building blocks of matter and therefore, in order to study their properties and interactions, it is required to probe distances on the smallest possible scales. According to the principles of quantum mechanics, this in turn requires high energies.

General Relativity

Gravity is the main sculptor of the universe. General relativity, which modifies the classical concepts of space and time, is intended to explain gravitational phenomena. The properties of certain astronomical objects, such as quasars (structures that combine extreme luminosity, e.g. 100 times that of a bright galaxy, with great compactness), pulsars (extremely dense stars that emit electromagnetic pulses with great regularity), imply that there are processes involving gravitational fields so strong that general relativity is needed to interpret the observations. The astonishing dimensions of large-scale structure, structures that in some cases span hundreds of millions of light-years, indicate that the variable curvature employed in general relativity plays an important role in the dynamical evolution of the universe. Most cosmological theories imply that the universe is expanding, with the galaxies receding from one another (as is made plausible by observations of the red shifts of their spectra), and that the universe as it is known originated in a primeval explosion at a date of the order of 20 billions years ago.


The implications of general relativity in astrophysics and cosmology are enormous and far reaching. The research interests of the group in this areas include:

Statistical and Plasma Physics