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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
Hilbert--Lie groups are Lie groups whose Lie algebra is a real Hilbert space whose scalar product is invariant under the adjoint action. These infinite-dimensional Lie groups are the closest relatives to compact Lie groups. Here we study unitary repr
Externí odkaz:
http://arxiv.org/abs/2402.13619
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
Autor:
Russo, Jorge G., Tierz, Miguel
Publikováno v:
Phys. Rev. A 109, 033702 (2024)
New exact formulas are derived for systems involving Landau-Zener transition rates and for absorption spectra in quantum dots. These rectify previous inaccurate approximations utilized in experimental studies. The exact formulas give an explicit expr
Externí odkaz:
http://arxiv.org/abs/2310.13058
The group of matrices $P_1$ of Pauli is a finite 2-group of order 16 and plays a fundamental role in quantum information theory, since it is related to the quantum information on the 1-qubit. Here we show that both $P_1$ and the Pauli 2-group $P_2$ o
Externí odkaz:
http://arxiv.org/abs/2308.05185
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