Moreover, we demonstrate that the PBHs may provide a significant amount ofĭark Matter in this Universe. Observable in principle patterns in the profile of GWs during the radiationĮra. As a result of such modulations, there isĪn enhanced production of PBHs and GWs in such cosmologies, which may lead to Model by world-sheet (non-perturbative) instanton terms of the axion fieldĪrising from string compactification. Invariant spectrum, consistent with the cosmological data, are provided in this Which results in a running-vacuum-model inflation. String-inspired model of two axion fields coupled to Chern-Simons gravity, Primordial black holes (PBHs) and gravitational waves (GWs) in a We study aspects of inflation and the possibility of enhanced production of Subjects: High Energy Physics - Theory (hep-th) Cosmology and Nongalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc) High Energy Physics - Phenomenology (hep-ph)
The degree of freedom number count confirms, it By substituting the general solution of the Nordstr\"omĮquation into the rest of the Einstein's system, we arrive at the fieldĮquations for the hook tensor. Linearised Nordstr\"om equation, with the hook tensor being the initial gauge We find the sequence of the reducible gauge transformations for the Solution is a pure gauge, modulo topological modes which we neglect in thisĪrticle. This equation, being considered irrespectively to the rest of theĮinstein system, corresponds to the topological field theory. Linearised system of Einstein equations which includes the Nordstr\"omĮquation. The starting point of the construction is the The equations describe the irreducible spin two massless The field equations are proposed for the third rank tensor field with the The background independent overarching principles underlying quantum gravity. I propose that manifest phase-spaceĭuality, and the related equivalence postulate of quantum mechanics, provide Is another important property of string theory, and can be thought of as Supersymmetric and non-supersymmetric vacua is briefly discussed. Structure, whose implications are yet to be unravelled. Mirror symmetryĪnd spinor-vector duality are mere two examples of a much wider symmetry Spinor-vector duality, which was discovered in worldsheetĬonstructions of string vacua, is an extension of mirror symmetry that arisesįrom mappings of the Wilson line moduli, and provide a probe to constrain andĮxplore the moduli spaces of $(2,0)$ string compactifications. Symmetry can be regarded as arising from mappings of the moduli of the internalĬompactified space. Of the moduli parameters of toroidally compactified Narain spaces, mirror Point of view, and its implications in that context were astounding. It was completely unexpected from the effective field theory Symmetry was first observed in worldsheet contructions of stringĬompactifications. The most celebrated example of this approach is mirror symmetry. Symmetries on the effective field theory representations of quantum gravity. Imprints and the constraints imposed by the string theory dualities and
An alternative top-down approach aim to explore the String theory?", and can be regarded as a bottom-up approach to investigations The Swampland Program aims to address the question, "when does an effectiveįield theory model of quantum gravity have an ultraviolet complete embedding in Subjects: High Energy Physics - Theory (hep-th) High Energy Physics - Phenomenology (hep-ph) Perturbative results available in the literature and find perfect agreement. Using this connection, we compute the OPE data of We also examine it analytically in various limits.Īt large spin the instanton expansion of the thermal two-point functionĭirectly maps to the light-cone bootstrap analysis of the heavy-lightįour-point function. The result is amenable to numericalĮvaluation upon truncating the number of instantons in the convergent expansion Nekrasov-Shatashvili partition function of an SU(2) supersymmetric gauge theory Of the Heun equation, which can be expressed in terms of the The two-point function is computed from the connection coefficients It reduces to the analysis of the wave equation on the AdS-Schwarzschildīackground. We present an exact formula for the thermal scalar two-point function inįour-dimensional holographic conformal field theories. Subjects: High Energy Physics - Theory (hep-th) General Relativity and Quantum Cosmology (gr-qc) Mathematical Physics (math-ph)
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