Results 31 to 40 of about 1,977,305 (306)
Field Redefinition Invariance in Quantum Field Theory [PDF]
, 2000 The issue of field redefinition invariance of path integrals in quantum field theory is reexamined. A ``paradox'' is presented involving the reduction to an effective quantum-mechanical theory of a $(d+1)$-dimensional free scalar field in a Minkowskian ...
Charap J. +4 more
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BQP-completeness of scattering in scalar quantum field theory [PDF]
Quantum, 2017 Recent work has shown that quantum computers can compute scattering probabilities in massive quantum field theories, with a run time that is polynomial in the number of particles, their energy, and the desired precision.
S. Jordan +3 more
semanticscholar +1 more source
Quantum Field Perturbation Theory Revisited [PDF]
, 2016 Schwinger's formalism in quantum field theory can be easily implemented in the case of scalar theories in $D$ dimension with exponential interactions, such as $\mu^D\exp(\alpha\phi)$. In particular, we use the relation $$ \exp\big(\alpha{\delta\over \
Matone, Marco
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PERTURBATIVE QUANTUM FIELD THEORY [PDF]
Challenges for the 21st Century, 2001 This talk introduces perturbative quantum field on a heuristic level. It is directed at an audience familiar with elements of quantum mechanics, but not necessarily with high energy physics. It includes a discussion of the strategies behind experimental tests of fundamental theories, and of the field theory interpretations of these tests.
openaire +4 more sources
Quantum field theory for discrepancies [PDF]
Nuclear Physics B, 1998 26 ...
Ronald Kleiss, A. van Hameren
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Exotic symmetries, duality, and fractons in 2+1-dimensional quantum field theory
, 2020 We discuss nonstandard continuum quantum field theories in 2+1 dimensions. They exhibit exotic global symmetries, a subtle spectrum of charged excitations, and dualities similar to dualities of systems in 1+1 dimensions.
N. Seiberg, Shu-Heng Shao
semanticscholar +1 more source
Emergence of string-like physics from Lorentz invariance in loop quantum gravity [PDF]
, 2014 We consider a quantum field theory on a spherically symmetric quantum space time described by loop quantum gravity. The spin network description of space time in such a theory leads to equations for the quantum field that are discrete.
Gambini, Rodolfo, Pullin, Jorge
core +3 more sources
QUANTUM FIELD THEORY IN GRAPHENE [PDF]
International Journal of Modern Physics: Conference Series, 2012 This is a short non-technical introduction to applications of the Quantum Field Theory methods to graphene. We derive the Dirac model from the tight binding model and describe calculations of the polarization operator (conductivity). Later on, we use this quantity to describe the Quantum Hall Effect, light absorption by graphene, the Faraday effect ...
Ignat Fialkovsky, Dmitri Vassilevich
openaire +5 more sources
Quantum field theory in (0 + 1) dimensions [PDF]
, 2007 We show that many of the key ideas of quantum field theory can be illustrated simply and straightforwardly by using toy models in (0 + 1) dimensions.
Boozer, A. D.
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Survey of mathematical foundations of QFT and perturbative string theory [PDF]
, 2011 Recent years have seen noteworthy progress in the mathematical formulation of quantum field theory and perturbative string theory. We give a brief survey of these developments.
Sati, Hisham, Schreiber, Urs
core +10 more sources