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Analytic bootstrap for perturbative conformal field theories
Published 2020“…<p>Conformal field theories (CFTs) play a central role in theoretical physics with many applications ranging from condensed matter to string theory. The conformal bootstrap studies conformal field theories using mathematical consistency conditions and has seen great progress over the last decade. …”
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2463
Aspects of supersymmetric gauge theories and conformal field theories in five and three dimensions
Published 2020“…<p>Supersymmetric gauge theories and superconformal field theories have long played a central role in string theory. In this thesis, which is split into two parts, we explore multiple facets of this rich class of theories.…”
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2464
$$AdS_5$$ A d S 5 vacua and holographic RG flows from 5D $$N=4$$ N = 4 gauged supergravity
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2465
Holographic RG flows and $$AdS_5$$ AdS5 black strings from 5D half-maximal gauged supergravity
Published 2019-02-01Get full text
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2466
The Structure of Reality, or Where to Find the Final Theory?
Published 2017-09-01“…In the fi nal part of this paper, several modern directions in the quantum gravity theory or TOE (string theory, loop quantum gravity, and causal sets) are considered regarding, as far as these theories are concerned, the formation of an abstract mathematical substratum. …”
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2467
New investigation of the analytical behaviors for some nonlinear PDEs in mathematical physics and modern engineering
Published 2024-03-01“…The executed outcomes are innovative and have monumental applications in the present research, especially in the fields of theoretical physics, astrophysics, plasma physics, particle physics, theory of relativity, advance quantum mechanics, string theory, and geotechnical engineering.…”
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2468
Hermitian and G2-structures with large symmetry groups
Published 2023“…<p>In the context of Hermitian geometry, the Hull--Strominger system is a system of non-linear PDEs on heterotic string theory, over a six-dimensional manifold endowed with an SU(3)-structure. …”
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Heterotic string models on smooth Calabi-Yau threefolds
Published 2013“…<p>This thesis contributes with a number of topics to the subject of string compactifications, especially in the instance of the <em>E<sub>8</sub></em> × <em>E<sub>8</sub></em> heterotic string theory compactified on smooth Calabi-Yau threefolds.…”
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2472
Neutrino interferometry for high-precision tests of Lorentz symmetry with IceCube
Published 2018“…However, unified theories, such as string theory, allow for violation of this symmetry by inducing new spacetime structure at the quantum gravity scale. …”
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2473
Phenomenologies in Hypersphere Soliton and Stringy Photon Models
Published 2023-08-01“…Next, making use of the Nambu-Goto string action and its extended rotating bosonic string theory, we formulate the stringy photon model to obtain the energy of the string configuration, which consists of the rotational and vibrational energies of the open string. …”
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2474
Neutrino Flavor Model Building and the Origins of Flavor and <inline-formula><math display="inline"><semantics><mi mathvariant="script">C</mi></semantics></math></inline-formula><i...
Published 2023-12-01“…Pursuit of flavor model building based on such frameworks thus also provides the connection to possible UV completions: in particular, to string theory. We emphasize the importance of constructing models in which the uncertainties of theoretical predictions are smaller than, or at most compatible with, the error bars of measurements in neutrino experiments. …”
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2475
A Real Scalar Field Unifying the Early Inflation and the Late Accelerating Expansion of the Universe through a Quadratic Equation of State: The Vacuumon
Published 2022-01-01“…We find that its mass is imaginary in the early universe with a modulus of the order of the Planck mass <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>M</mi><mi>P</mi></msub><mo>=</mo><msup><mrow><mo>(</mo><mo>ℏ</mo><mi>c</mi><mo>/</mo><mi>G</mi><mo>)</mo></mrow><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup><mo>=</mo><mn>1.22</mn><mo>×</mo><msup><mn>10</mn><mn>19</mn></msup><mspace width="0.166667em"></mspace><mrow><mi>GeV</mi><mo>/</mo><msup><mi mathvariant="normal">c</mi><mn>2</mn></msup></mrow></mrow></semantics></math></inline-formula> and real in the late universe with a value of the order of the cosmon mass <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>m</mi><mo>Λ</mo></msub><mo>=</mo><msup><mrow><mo>(</mo><mo>Λ</mo><msup><mo>ℏ</mo><mn>2</mn></msup><mo>/</mo><msup><mi>c</mi><mn>4</mn></msup><mo>)</mo></mrow><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup><mo>=</mo><mn>2.08</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>33</mn></mrow></msup><mspace width="0.166667em"></mspace><mrow><mi>eV</mi><mo>/</mo><msup><mi mathvariant="normal">c</mi><mn>2</mn></msup></mrow></mrow></semantics></math></inline-formula> predicted by string theory. Although our model is able to describe the evolution of the homogeneous background for all times, it cannot account for the spectrum of fluctuations in the early universe. …”
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2476
Local Zeta Functions and Koba–Nielsen String Amplitudes
Published 2021-05-01“…They showed that this limit gives rise to a boundary string field theory, which was previously proposed by Witten in the context of background independent string theory. Explicit computations in the cases of 4 and 5 points show that the Feynman amplitudes at the tree level of the Gerasimov–Shatashvili Lagrangian are related to the limit <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>p</mi><mo>→</mo><mn>1</mn></mrow></semantics></math></inline-formula> of the <i>p</i>-adic Koba–Nielsen amplitudes. …”
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2477
Running Vacuum in the Universe: Phenomenological Status in Light of the Latest Observations, and Its Impact on the <i>σ</i><sub>8</sub> and <i>H</i><sub>0</sub> Tensions
Published 2023-05-01“…This dynamical scenario is grounded on recent studies of quantum field theory (QFT) in curved spacetime and also on string theory. It turns out that what we call the ‘cosmological constant’, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="sans-serif">Λ</mi></semantics></math></inline-formula>, is no longer a rigid parameter but the nearly sustained value of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>8</mn><mi>π</mi><mi>G</mi><mrow><mo>(</mo><mi>H</mi><mo>)</mo></mrow><msub><mi>ρ</mi><mi>vac</mi></msub><mrow><mo>(</mo><mi>H</mi><mo>)</mo></mrow></mrow></semantics></math></inline-formula> around any given epoch <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>H</mi><mo>(</mo><mi>t</mi><mo>)</mo></mrow></semantics></math></inline-formula>, where <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>G</mi><mo>(</mo><mi>H</mi><mo>)</mo></mrow></semantics></math></inline-formula> is the gravitational coupling, which can also be very mildly running (logarithmically). …”
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Constraints on cosmic strings using data from the first Advanced LIGO observing run
Published 2018“…They are also predicted to form in the context of string theory. The main mechanism for a network of Nambu-Goto cosmic strings to lose energy is through the production of loops and the subsequent emission of gravitational waves, thus offering an experimental signature for the existence of cosmic strings. …”
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Little strings on D n orbifolds
Published 2017-10-01“…Abstract We explore two classes of 6d N = 1 0 $$ \mathcal{N}=\left(1,0\right) $$ little string theories obtained from type IIA/IIB NS5-branes probing D n singularities. …”
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Dual little strings from F-theory and flop transitions
Published 2017-07-01“…Abstract A particular two-parameter class of little string theories can be described by M parallel M5-branes probing a transverse affine A N − 1 singularity. …”
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