Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Vaman, Diana"'
We revisit the fundamentals of two different methods for calculating classical observables: the eikonal method, which is a scattering amplitude-based method, and the worldline quantum field theory (WQFT) method. The latter has been considered an exte
Externí odkaz:
http://arxiv.org/abs/2409.17866
In this paper, working in the eikonal approximation, we present a proof for the exponentiation of the 2-body eikonal phase to {\it all orders in the eikonal expansion}, for scalar particles interacting electromagnetically or gravitationally. The proo
Externí odkaz:
http://arxiv.org/abs/2409.12895
Autor:
Du, Yuchen, Vaman, Diana
We use the worldline formalism to study tree-level scattering processes involving gravitons. A massless spin 2 particle is described by an $N=4$ supersymmetric worldline action which is also $O(4)$ symmetric. More generally, $N=2S$ supersymmetric wor
Externí odkaz:
http://arxiv.org/abs/2308.11326
Allowing for the possibility of extra dimensions, there are two paradigms: either the extra dimensions are hidden from observations by being compact and small as in Kaluza-Klein scenarios, or the extra dimensions are large/non-compact and undetectabl
Externí odkaz:
http://arxiv.org/abs/2301.11139
Publikováno v:
Phys. Rev. D 103, 044031 (2021)
We study the effect of compact extra dimensions on the gravitational wave luminosity and waveform. We consider a toy model, with a compactified fifth dimension, and matter confined on a brane. We work in the context of five dimensional ($5d$) general
Externí odkaz:
http://arxiv.org/abs/2004.03051
We present a metric-independent, diffeomorphism-invariant model with interacting fermions that contains a massless composite graviton in its spectrum. The model is motivated by the supersymmetric D-brane action, modulated by a fermion potential. The
Externí odkaz:
http://arxiv.org/abs/1812.08201
Publikováno v:
Phys. Rev. D 98, 024041 (2018)
We consider a theory of scalars minimally coupled to an auxiliary background metric. The theory is generally covariant and subject to the constraint of vanishing energy-momentum tensor. Eliminating the auxiliary metric leads to a reparametrization in
Externí odkaz:
http://arxiv.org/abs/1710.09367
Publikováno v:
Phys. Rev. B 98, 035134 (2018)
In past work we introduced a method which allows for exact computations of entanglement Hamiltonians. The method relies on computing the resolvent for the projected (on the entangling region) Green's function using a solution to the Riemann-Hilbert p
Externí odkaz:
http://arxiv.org/abs/1704.01536
A constraint of vanishing energy-momentum tensor is motivated by a variety of perspectives on quantum gravity. We demonstrate in a concrete example how this constraint leads to a metric-independent theory in which quantum gravity emerges as a nonpert
Externí odkaz:
http://arxiv.org/abs/1610.08521
We propose a method of computing one-loop determinants in black hole spacetimes (with emphasis on asymptotically anti-de Sitter black holes) that may be used for numerics when completely-analytic results are unattainable. The method utilizes the expr
Externí odkaz:
http://arxiv.org/abs/1603.08994