Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Russo, A G"'
Autor:
Russo, Jorge G., Townsend, Paul K.
For any causal nonlinear electrodynamics theory that is "self-dual" (electromagnetic $U(1)$-duality invariant), the Legendre-dual pair of Lagrangian and Hamiltonian densities $\{\mathcal{L},\mathcal{H}\}$ are constructed from functions $\{\ell,h\}$ o
Externí odkaz:
http://arxiv.org/abs/2407.02577
Autor:
Russo, Jorge G.
In the context of Kaluza-Klein theories, the time dilation of charged particles in an external field depends on the charge in a specific way. Experimental tests are proposed to search for extra dimensions using this distinctive feature.
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Externí odkaz:
http://arxiv.org/abs/2405.10321
Autor:
Russo, Jorge G., Townsend, Paul K.
For the general theory of nonlinear electrodynamics (NLED), we prove that causality implies both the Dominant Energy Condition (DEC) and, surprisingly, the Strong Energy Condition (SEC). This has implications for gravitational applications, such as r
Externí odkaz:
http://arxiv.org/abs/2404.09994
Autor:
Russo, Jorge G., Townsend, Paul K.
Many theories of nonlinear electrodynamics (NLED) that have been proposed in physical contexts involving strong fields are causal for weak fields but acausal for strong fields. We show that for any such theory there is a unique causal and self-dual (
Externí odkaz:
http://arxiv.org/abs/2401.06707
Autor:
Russo, Jorge G., Townsend, Paul K.
Publikováno v:
SciPost Phys. 16, 124 (2024)
Born's original 1933 theory of nonlinear electrodynamics (in contrast to the later Born-Infeld theory) is acausal for strong fields. We explore the issue of strong-field causality violation in families of theories containing Born and/or Born-Infeld,
Externí odkaz:
http://arxiv.org/abs/2401.04167
Using Hamiltonian methods, we find six relativistic theories of nonlinear electrodynamics for which plane wave perturbations about a constant uniform background are not birefringent. All have the same conformal strong-field limit to Bialynicki-Birula
Externí odkaz:
http://arxiv.org/abs/2311.04278
Publikováno v:
Phys. Rev. D 108, L041701 (2023)
We consider a general scalar QFT with a linear defect in $D=4-\epsilon$ and a surface defect in $D=6-\epsilon$. Using holography and the Hamilton-Jacobi formalism, we show that the $\beta$ functions controlling the defect RG flow are the gradient of
Externí odkaz:
http://arxiv.org/abs/2306.11796
Autor:
Russo, Jorge G.
We use the method of the superpotential to derive exact solutions describing inflationary cosmologies in multi-field models. An example that describes a solution that interpolates between two de Sitter universes is described in detail. New analytical
Externí odkaz:
http://arxiv.org/abs/2304.12360
Publikováno v:
J. High Energ. Phys. 2023. 105 (2023)
We investigate defects in scalar field theories in four and six dimensions in a double-scaling (semiclassical) limit, where bulk loops are suppressed and quantum effects come from the defect coupling. We compute $\beta $-functions up to four loops an
Externí odkaz:
http://arxiv.org/abs/2303.01935
Autor:
Russo, Jorge G., Townsend, Paul K.
All solutions of the no-birefringence conditions for nonlinear electrodynamics are found. In addition to the known Born-Infeld and Plebanski cases, we find a ``reverse Born-Infeld'' case, which has a limit to Plebanski, and an ``extreme-Born-Infeld''
Externí odkaz:
http://arxiv.org/abs/2211.10689