string-theory

We prove that the computational successes of string theory are consequences of two mathematical structures: the four normed division algebras and the axioms of two-dimensional conformal field theory. Eight results are established. (1) The Green-Schwarz critical dimensions D in {3,4,6,10} are classified by normed division algebras via the Hurwitz theorem. (2) The Veneziano amplitude and the celest…

On proof of AdS/CFT duality for the special case of : Shouvik Datta, Lorenz Eberhardt, Matthias Gaberdiel, Stringy holography for JHEP 1801 (2018) 146 (arXiv:1709.06393) Lorenz Eberhardt, Matthias Gaberdiel, String theory on and the symmetric orbifold of Liouville theory (arXiv:1903.00421) Lorenz Eberhardt, Matthias Gaberdiel, Strings on (arXiv:1904.01585) Lorenz Eberhardt, Matthias Gaberdiel, Ra…

algebraic quantum field theory (perturbative, on curved spacetimes, homotopical) quantum mechanical system, quantum probability interacting field quantization In the context of quantum field theory, Liouville theory is the name of a certain type of 2d CFT. An argument (via Chern-Simons gravity, but see the caveats there) that 3d quantum gravity with negative cosmological constant has as boundary …

On the QCD phase diagram and the description of neutron stars via holographic QCD: Carlos Hoyos, Niko Jokela, Matti Järvinen, Javier G. Subils, Javier Tarrio, Aleksi Vuorinen, Transport in strongly coupled quark matter, Phys. Rev. Lett. 125 (2020) 241601 7Lbrack;arXiv:2005.14205, doi:10.1103/PhysRevLett.125.241601] Carlos Hoyos, Niko Jokela, Matti Järvinen, Javier G. Subils, Javier Tarrio, Aleksi…

Introducing Nielsen-Olesen vortex strings inspired from Abrikosov vortices in type II superconductors and thereby laying the ground for the dual superconductor model of color confinement:

Key ideas underlying what is now known as holographic duality in string theory and specifically as holographic QCD (see also at holographic light front QCD) were preconceived by Alexander Polyakov (cf. historical reminiscences in Polyakov (2008)) under the name gauge/string duality, in efforts to understand confined QCD (the mass gap problem) by regarding color-flux tubes (Wilson lines) between q…

Yoichiro Nambu (1921–2015) Christopher T. Hill, A personal recollection of Yoichiro Nambu, Section VI in: Nambu and Compositeness [arXiv:2401.08716] On his contributions to string theory: Prediction of the omega-meson: Introducing discussion of what came to be called the Nambu-Goto action for strings (then motivated as explanation for the “dual resonance model” for hadrons, cf. Polyakov gauge-str…

Holger Frits Bech Nielsen Introducing Nielsen-Olesen vortex strings inspired from Abrikosov vortices in type II superconductors and thereby laying the ground for the dual superconductor model of color confinement: On the Cheshire cat principle of the quark bag model: and derivation from the AdS/QCD correspondence:

On string junctions in relation to Lie algebra representations: Oliver DeWolfe, Barton Zwiebach: String Junctions for Arbitrary Lie Algebra Representations, Nucl. Phys. B 541 (1999) 509-565 [doi:10.1016/S0550-3213(98)00743-3, arXiv:hep-th/9804210] Oliver DeWolfe, Tamas Hauer, Amer Iqbal, Barton Zwiebach: Uncovering the Symmetries on 7-branes: Beyond the Kodaira Classification, Adv. Theor. Math. P…

One of the co-discoverers of supergravity (4d supergravity). Introducing 4d supergravity: On the stability of Freund-Rubin compactifications: Early discussion of quantum field theory on anti de Sitter spacetimes: On supergravity: On multi-trace operators in the AdS/CFT correspondence:

On bosonic closed string field theory and introducing its relation to -algebras: Barton Zwiebach, Issues In Covariant Closed String Theory, pp 192-200 in: Proceedings of 10th and Final Workshop on Grand Unification, 20-22 Apr 1989. Chapel Hill, North Carolina [spire:282685] Barton Zwiebach, Closed string field theory: Quantum action and the Batalin-Vilkovisky master equation, Nucl. Phys. B 390 1 …

There are -BPS state solutions of type IIB supergravity which locally exhibit black branes in the shape of three -strings jointly intersecting. Globally many of such 3-string junctions may combine to form a more complicated network of black string configurations, hence called a string network (Sen 97). The lift to 11d supergravity/M-theory of 3-string junctions is supposed to be given by membrane…

On string junctions in relation to Lie algebras and Lie algebra representations: On a mysterious duality: On M-strings/self-dual strings: and the M-string elliptic genus: Stefan Hohenegger, Amer Iqbal, M-strings, Elliptic Genera and String Amplitudes, Fortschritte der PhysikVolume 62, Issue 3 (arXiv:1310.1325) Stefan Hohenegger, Amer Iqbal, Soo-Jong Rey, M String, Monopole String and Modular Form…

String theory is exponentially disfavored under every standard parsimony measure. It requires 3,000 to 4,700 bits of specification to reproduce observed physics, including at least 1,661 bits to index one vacuum from a landscape of 10^500 candidates. The Standard Model's 26 scalar parameters require at most a few hundred bits at measurement precision, and potentially far fewer if compressible gen…

Early discussion of U-duality-covariant D=11 supergravity (later: “exceptional field theory”): Bernard de Wit, Hermann Nicolai: D = 11 Supergravity With Local Invariance, Nucl. Phys. B 274, 363 (1986) [doi:10.1016/0550-3213(86)90290-7, spire:227409] Bernard de Wit, Hermann Nicolai: Local SU(8) invariance in supergravity, talk at Nuffield Workshop on Supersymmetry and its Applications, 0357 [spire…

On Lorentzian orbifolds as target spacetimes in string theory: On the Gromov-Witten/Donaldson-Thomas correspondence: On Knizhnik-Zamolodchikov equations controlling codimension defects in D=4 super Yang-Mills theory: Nikita Nekrasov, BPS/CFT correspondence V: BPZ and KZ equations from -characters [arXiv:1711.11582] Nikita Nekrasov, Alexander Tsymbaliuk, Surface defects in gauge theory and KZ equa…

I was reading page 16 of Introduction to String Theory. Using the general formula for the change of a field $\phi$ under an infinitesimal reparametrization $\tilde{\tau} = \tau + \theta(\tau)$, ...

Discussion of twisted differential K-theory and its relation to D-brane charge in type II string theory: and for KO: On differential Cohomotopy and Hypothesis H: On locality of extended functorial field theory: On the cobordism hypothesis for extended functorial field theory equipped with geometric structure (such as conformal field theory etc.): On the ordinary differential cohomology and differ…

String theory has changed the foundations of physics profoundly, and I for one am worried about its legacy.

Modern physics invites a reconsideration of existence, identity, and reality itself. String theory proposes that all matter and forces emerge from infinitesimal, vibrating one-dimensional strings, while hidden dimensions beyond perception shape the fundamental properties of our universe. Amid these microscopic structures, human identity persists despite constant atomic and subatomic flux. Drawing…