University College London
Quantum information theory
Understanding information in the quantum world is one of the key components of my work. I am primarily motivated by the fact that information theory offers new mathematical tools to understand physical theories such as quantum mechanics, field theory, and possible alternative theories. It also allows for new applications such as the quantum computer which researchers are trying to build, and which will be able to solve hard mathematical problems in a short time. I am also interested in applying insights from quantum information theory to other areas of physics, in particular, black hole thermodynamics and quantum gravity.
In addition to my work in pure quantum information, I am also interested in quantum
gravity, and in black holes. The quantum theory of gravity is expected to lead to
revisions of our classical ideas of gravity, and probably our notion of quantum
mechanics. Thus, exploring the interface between the fields of quantum gravity and
quantum information is a potentially fruitful endeavour. Perhaps the most important
arena of study in this regard, is the black hole. It is in black holes, where gravitational
effects become so strong, that quantum effects become important. The black hole has
an entropy, which is believed to have a quantum mechanics origin. Thus, understanding
the origin of this entropy is a key goal of many physicists.
Interests and expertise (Subject groups)