Gorbenko, Victor. From QCD Flux Tubes to Gravitational S-matrix and Back [electronic resource] / / by Victor Gorbenko.. — 1st ed. 2017.. — XII, 133 p. 32 illus., 24 illus. in color. : online resource. — (Springer Theses, Recognizing Outstanding Ph.D. Research,) 2190-5053. - Springer Theses, Recognizing Outstanding Ph.D. Research, .
Effective Field Theory for Relativistic Strings -- Worldsheet S-matrix -- Simplest Quantum Gravity -- Natural Tuning.-Flux Tube Spectrum from Thermodynamic Bethe Ansatz.
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Анотація: This thesis studies various aspects of non-critical strings both as an example of a non-trivial and solvable model of quantum gravity and as a consistent approximation to the confining flux tube in quantum chromodynamics (QCD). It proposes and develops a new technique for calculating the finite volume spectrum of confining flux tubes. This technique is based on approximate integrability and it played a game-changing role in the study of confining strings. Previously, a theoretical interpretation of available high quality lattice data was impossible, because the conventional perturbative expansion for calculating the string spectra was badly asymptotically diverging in the regime accessible on the lattice. With the new approach, energy levels can be calculated for much shorter flux tubes than was previously possible, allowing for a quantitative comparison with existing lattice data. The improved theoretical control makes it manifest that existing lattice data provides strong evidence for a new pseudoscalar particle localized on the QCD fluxtube - the worldsheet axion. The new technique paves a novel and promising path towards understanding the dynamics of quark confinement.
9783319446035
10.1007/978-3-319-44603-5 doi
Quantum field theory. String theory. Gravitation. Cosmology. Quantum Field Theories, String Theory. Classical and Quantum Gravitation, Relativity Theory. Cosmology.