I am a member of the Mathematical
Physics group working on quantum theory in flat and curved spacetimes.
Much of my work involves applying rigorous mathematics (particularly functional
analysis) to solve problems of physical interest. My current research focusses
on two main areas:
|Christopher J Fewster
Department of Mathematics
University of York
York YO10 5DD
Tel: (01904) 323091
Fax: (01904) 323071
- Quantum Energy Inequalities
Unlike most classical forms of matter, quantum fields can have local energy densities that are negative.
However, quantum field theory contains mechanisms (deeply connected to the uncertainty principle) that result in the energy density not being too negative on average. These mechanisms are expressed by results called Quantum Energy Inequalities (QEIs). Much of my work in the period 1998-2008 was devoted to proving QEIs for various different quantum field theories and to examining their consequences and this is still an active area of work. A summary of the area, which also provides a mini-introduction to quantum field theory in curved spacetimes, can be found in my recent Lectures on Quantum Energy Inequalities
- Locally covariant quantum field theory
Quantum field theory in Minkowski space depends in many ways on the high degree of spacetime symmetry.
General curved spacetimes lack any symmetry at all, which makes it hard to prove general statements about
general quantum field theories (as opposed to specific models). Work by Brunetti, Fredenhagen and Verch
established a new framework for studying quantum field theory using tools from category theory.
My recent work has explored a number of aspects of this framework.
I also work on other aspects of quantum field theory; see my full
for details. My teaching and administrative responsibilities can be found on my departmental web page.
Page maintained by CJ Fewster.