Quantum field theory was originally developed as the extension of quantum mechanics needed to accommodate the principles of special relativity. Today quantum field theory is the modern paradigm with which we understand particle physics, condensed matter systems, and many aspects of early universe cosmology, and it is used to describe the interactions of elementary particles, the dynamics of many body systems and critical phenomena, all with exquisite accuracy. Currently, Perimeter researchers are producing world-leading advances in the study of integrability and scattering amplitudes in quantum field theories. String theory is a theoretical framework which was proposed to produce a unified description of all particles and forces in nature, including gravity. It is based on the idea that at very short distances, all particles should in fact be seen to be extended one-dimensional objects, i.e., ‘strings.’ Modern string theory has grown to be a broad and varied field of research with strong connections to quantum gravity, particle physics and cosmology, as well as mathematics. An exciting new framework known as ‘holography’ has emerged from string theory whereby quantum gravity is formulated in terms of quantum field theory in one less dimension. This symbiosis between quantum field theory and quantum gravity has been a focus of many Perimeter researchers. This has led to the development of exciting new methods to study the quantum dynamics of gauge theories and in the application of these techniques to new domains, such as nuclear physics and condensed matter physics
Format results
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University of Oregon
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Expansion of Lie algebras and accidental symmetries in Lovelock theories
Pontificia Universidad Católica de Chile -
Explicit multiloop amplitude computations with the pure spinor formalism
University of Cambridge -
Multiloop SYM and supergravity amplitudes in pure spinor superspace
Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI) -
PSI 2014/2015 - Explorations in String Theory - Lecture 15
Perimeter Institute for Theoretical Physics -
Notes on the Type II worldsheet sigma-model
Universidad Autonoma de Madrid -
Origin and Applications of the Pure Spinor Formalism
ICTP - SAIFR -
Superstring amplitudes in the operator formalism
Queen Mary University of London -
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PSI 2014/2015 - Explorations in String Theory - Lecture 14
Perimeter Institute for Theoretical Physics -
Mass renormalization and vacuum shift using Off-shell string theory
University of Cambridge -
1PI Effective Action for Superstring Perturbation Theory
Harish-Chandra Research Institute