Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Erlich, Joshua"'
Observations of velocity dispersions of galactic structures over a wide range of scales point to the existence of a universal acceleration scale $a_0\sim 10^{-10}$ m/s$^2$. Focusing on the fuzzy dark matter paradigm, which proposes ultralight dark ma
Externí odkaz:
http://arxiv.org/abs/2405.08744
Autor:
Erlich, Joshua
We present a first analysis of a nonperturbative approach to quantum gravity based on a representation of quantum field theory in terms of stochastic processes. The stochastic description accommodates a physical Lorentz-invariant ultraviolet regulato
Externí odkaz:
http://arxiv.org/abs/2208.10268
We explore a background-independent theory of composite gravity. The vacuum expectation value of the composite metric satisfies Einstein's equations (with corrections) as a consistency condition, and selects the vacuum spacetime. A gravitational inte
Externí odkaz:
http://arxiv.org/abs/2011.06541
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
Autor:
Erlich, Joshua
We present a stochastic framework for emergent quantum gravity coupled to matter. The Hamiltonian constraint in diffeomorphism-invariant theories demands the identification of a clock relative to which dynamics may be defined, and other degrees of fr
Externí odkaz:
http://arxiv.org/abs/1807.07083
Publikováno v:
Class. Quant. Grav. 35, no.11, 115008 (2018)
Field theories that are generally covariant but nongravitational at tree level typically give rise to an emergent gravitational interaction whose strength depends on a physical regulator. We consider emergent gravity models in which scalar fields ass
Externí odkaz:
http://arxiv.org/abs/1710.07262
Autor:
Erlich, Joshua1 (AUTHOR) erlich@physics.wm.edu
Publikováno v:
Modern Physics Letters A. Dec2024, p1. 12p. 2 Illustrations.
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
Multi-field inflation models include a variety of scenarios for how inflation proceeds and ends. Models with the same potential but different kinetic terms are common in the literature. We compare spiral inflation and Dante's inferno-type models, whi
Externí odkaz:
http://arxiv.org/abs/1509.06781
Publikováno v:
Phys. Rev. D 91, 043512 (2015)
We describe a hybrid axion-monodromy inflation model motivated by the Dante's Inferno scenario. In Dante's Inferno, a two-field potential features a stable trench along which a linear combination of the two fields slowly rolls, rendering the dynamics
Externí odkaz:
http://arxiv.org/abs/1410.2593