Results 101 to 110 of about 21,587 (313)
Horizon entropy with loop quantum gravity methods
Physics Letters B, 2015 We show that the spherically symmetric isolated horizon can be described in terms of an SU(2) connection and an su(2)-valued one-form, obeying certain constraints.
Daniele Pranzetti, Hanno Sahlmann
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Infinities in Quantum Gravities [PDF]
Annalen der Physik, 2000 AbstractWe first present a review, intended for classical relativists, of the ultraviolet difficulties faced by local quantum gravity theories in both the usual Einstein versions and in their supergravity extensions, at least perturbatively. These problems, present in arbitrary dimensions, are traceable to the dimensionality of the Einstein constant.We
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Quantum Gravity on a Torus [PDF]
Acta Physica Polonica B Proceedings Supplement, 2020 To appear in Acta Physica Polonica B Proceedings Supplement. Presented at the 6th Conference of the Polish Society on Relativity.
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Anisotropic Second‐ and Third‐Harmonic Hermite–Gaussian Beam Generation with NbOI2 Holograms
Advanced Photonics Research, EarlyView.Anisotropic second‐ and third‐harmonic Hermite–Gaussian (HG) beam generation is demonstrated with ultrathin NbOI2 grating holograms to produce the nonlinear HG01 and HG10 modes with high anisotropy ratios. The relative magnitudes of the second‐ and third‐order nonlinear susceptibility tensor elements of NbOI2 crystal are extracted. These demonstrations
Jayanta Deka, Jie Gao, Xiaodong Yang
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Complexity and operator growth for quantum systems in dynamic equilibrium
Journal of High Energy PhysicsKrylov complexity is a measure of operator growth in quantum systems, based on the number of orthogonal basis vectors needed to approximate the time evolution of an operator.
Cameron Beetar +4 more
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Relational Lorentzian Asymptotically Safe Quantum Gravity: Showcase Model
UniverseIn a recent contribution, we identified possible points of contact between the asymptotically safe and canonical approaches to quantum gravity. The idea is to start from the reduced phase space (often called relational) formulation of canonical quantum ...
Renata Ferrero, Thomas Thiemann
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Quantum gravity is a critical area of research aiming to reconcile the principles of general relativity and quantum mechanics. While general relativity explains the gravitational forces acting on massive bodies, it lacks compatibility with quantum mechanics, which governs the behavior of subatomic particles.
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Energy Symmetry Breaking of Dirac and Weyl Fermions in Magnetized Spinning Conical Geometries
Advanced Theory and Simulations, EarlyView.Exact solutions for relativistic fermions in magnetized, spinning conical geometries reveal defect‐induced symmetry breaking between fermion and antifermion energies. Energy levels depend on the magnetic field, background geometry, and fractionalized spin. When the defect's spin dominates, quantum effects diminish.
Abdullah Guvendi, Omar Mustafa
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European Physical Journal C: Particles and Fields, 2017 Applying the anholonomic frame deformation method, we construct various classes of cosmological solutions for effective Einstein–Yang–Mills–Higgs, and two measure theories.
Subhash Rajpoot, Sergiu I. Vacaru
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Advanced Science, EarlyView.This review summarizes the recent advances in mono‐elemental 2D materials, or Xenes, including their synthesis strategies, theoretical guidance, and stability challenges. It highlights emerging approaches such as deep learning‐assisted design with encapsulation techniques and heterostructure for scalable production and practical applications in ...
Yufan Yang +5 more
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