Results 71 to 80 of about 685 (210)

de Sitter State in Heterotic String Theory

Fortschritte der Physik, Volume 72, Issue 11, November 2024.
Abstract Recent no‐go theorems have ruled out four‐dimensional classical de Sitter vacua in heterotic string theory. On the other hand, the absence of a well‐defined Wilsonian effective action and other related phenomena also appear to rule out such time‐dependent vacua with de Sitter isometries, even in the presence of quantum corrections.
Stephon Alexander, Keshav Dasgupta, Archana Maji, Pichai Ramadevi, Radu Tatar   +4 more
wiley   +1 more source

Topics in perturbation theory [PDF]

, 1992
In providing a means of progressively improving an initial estimate, perturbation series have become a ubiquitous tool in modern physics. However, and mainly because this stepwise process of improvement rapidly becomes increasingly involved, surprisingly
Barclay, D.T, Barclay, David Thomas
core  

Small circle expansion for adjoint QCD2 with periodic boundary conditions

Journal of High Energy Physics
We study 1 + 1-dimensional SU(N) gauge theory coupled to one adjoint multiplet of Majorana fermions on a small spatial circle of circumference L. Using periodic boundary conditions, we derive the effective action for the quantum mechanics of the holonomy
Ross Dempsey, Igor R. Klebanov, Silviu S. Pufu, Benjamin T. Søgaard   +3 more
doaj   +1 more source

Bion non-perturbative contributions versus infrared renormalons in two-dimensional ℂP N − 1 models

Journal of High Energy Physics, 2019
We derive the semiclassical contributions from the real and complex bions in the two-dimensional ℂP N − 1 sigma model on ℝ×S 1 with a twisted boundary condition. The bion configurations are saddle points of the complexified Euclidean action, which can be
Toshiaki Fujimori, Syo Kamata, Tatsuhiro Misumi, Muneto Nitta, Norisuke Sakai   +4 more
doaj   +1 more source

Interface‐Interactive Nanoarchitectonics: Solid and/or Liquid

ChemPhysChem, Volume 25, Issue 19, October 1, 2024.
As the concept of post‐nanotechnology, the new concept of nanoarchitectonics is now emerging. However, such structural control and fabrication are not always easy. A realistic methodology to control such structures is the use of interfacial environments. In this review paper, under the title of interface‐interactive nanoarchitectonics, several examples
Katsuhiko Ariga
wiley   +1 more source

Iwahori‐metaplectic duality

Journal of the London Mathematical Society, Volume 109, Issue 6, June 2024.
Abstract We construct a family of solvable lattice models whose partition functions include p$p$‐adic Whittaker functions for general linear groups from two very different sources: from Iwahori‐fixed vectors and from metaplectic covers. Interpolating between them by Drinfeld twisting, we uncover unexpected relationships between Iwahori and metaplectic ...
Ben Brubaker, Valentin Buciumas, Daniel Bump, Henrik P. A. Gustafsson   +3 more
wiley   +1 more source

Spectral and wave function statistics in Quantum digraphs [PDF]

, 2012
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Spectral and wave function statistics of the quantum directed graph, QdG, are studied.
Megaides, Rodrigo
core  

Exploring T‐Duality for Self‐Dual Fields

Fortschritte der Physik, Volume 72, Issue 5, May 2024.
Abstract Avatars of T‐duality within Sen's formalism for self‐dual field strengths in various dimensions are studied. This formalism is shown to naturally accommodate the T‐duality relation between Type IIA/IIB theories when compactified on a circle without the need for imposing the self‐duality constraint by hand, as is usually done. The study of this
Subhroneel Chakrabarti, Madhusudhan Raman   +1 more
wiley   +1 more source

Predicting the flavour and SUSY flavour structure from grand unified theories [PDF]

, 2016
Grand Unified Theories (GUTs) offer an attractive framework for flavour models, since they feature relations between quarks and leptons. Combining them with Supersymmetry (SUSY) and flavour symmetries, we derive predictions for the flavour and SUSY ...
Sluka, Constantin
core   +1 more source

Octonionic Magical Supergravity, Niemeier Lattices, and Exceptional & Hilbert Modular Forms

Fortschritte der Physik, Volume 72, Issue 2, February 2024.
Abstract The quantum degeneracies of Bogomolny‐Prasad‐Sommerfield (BPS) black holes of octonionic magical supergravity in five dimensions are studied. Quantum degeneracy is defined purely number theoretically as the number of distinct states in charge space with a given set of invariant labels.
Murat Günaydin, Abhiram Kidambi
wiley   +1 more source