Florian Ecker
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View article: Postcarrollian gravity
Postcarrollian gravity Open
We construct postcarrollian gravity models in two, three, and four spacetime dimensions by applying algebraic expansion methods. As a byproduct, we present the most general postcarrollian 2d dilaton gravity model, construct its solutions a…
View article: Tantum gravity
Tantum gravity Open
We argue there is an interesting triple-scaling limit of quantum gravity, namely when Planck’s constant scales to infinity while Newton’s constant and the speed of light tend to zero, keeping fixed the gravitational coupling GNc−4 and the …
View article: Tantum Gravity
Tantum Gravity Open
We argue there is an interesting triple-scaling limit of quantum gravity, namely when Planck's constant scales to infinity while Newton's constant and the speed of light tend to zero, keeping fixed the gravitational coupling $G_N\,c^{-4}$ …
View article: Angle of Null Energy Condition Lines in Critical Spacetimes
Angle of Null Energy Condition Lines in Critical Spacetimes Open
We identify a new critical parameter in Choptuik's gravitational collapse: the angle at which null energy condition (NEC) saturation lines intersect at the center of the critical spacetime. These NEC lines coincide with regions of vanishin…
View article: Carroll-Hawking effect
Carroll-Hawking effect Open
Carroll black holes with an associated Carroll temperature were introduced recently. So far, it is unclear if they exhibit a Hawking-like effect. To solve this, we study scalar fields on Carroll black hole backgrounds. Inspired by anomaly …
View article: Carroll-invariant propagating fields
Carroll-invariant propagating fields Open
We construct Carroll-invariant theories with fields propagating outside the Carroll light cone, i.e., at a speed strictly greater than zero (“Carroll swiftons”). We first consider models in flat Carroll spacetime in general dimensions, whe…
View article: Carroll swiftons
Carroll swiftons Open
We construct Carroll-invariant theories with fields propagating outside the Carroll lightcone, i.e., at a speed strictly greater than zero (`Carroll swiftons'). We first consider models in flat Carroll spacetime in general dimensions, wher…
View article: Carroll black holes
Carroll black holes Open
Despite the absence of a lightcone structure, some solutions of Carroll gravity show black hole-like behaviour. We define Carroll black holes as solutions of Carroll gravity that exhibit Carroll thermal properties and have a Carroll extrem…
View article: Report on 2308.10947v1
Report on 2308.10947v1 Open
Despite the absence of a lightcone structure, some solutions of Carroll gravity show black hole-like behaviour.We define Carroll black holes as solutions of Carroll gravity that exhibit Carroll thermal properties and have a Carroll extrema…
View article: Report on 2308.10947v1
Report on 2308.10947v1 Open
Despite the absence of a lightcone structure, some solutions of Carroll gravity show black hole-like behaviour.We define Carroll black holes as solutions of Carroll gravity that exhibit Carroll thermal properties and have a Carroll extrema…
View article: Carroll black holes
Carroll black holes Open
Despite the absence of a lightcone structure, some solutions of Carroll gravity show black hole-like behaviour. We define Carroll black holes as solutions of Carroll gravity that exhibit Carroll thermal properties and have a Carroll extrem…
View article: Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals
Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals Open
A bstract Dilaton gravities in two dimensions can be formulated as particular Poisson sigma models. Target space diffeomorphisms map different models to each other and establish a one-to-one correspondence between their classical solutions…
View article: Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals
Equivalences between 2D dilaton gravities, their asymptotic symmetries, and their holographic duals Open
Dilaton gravities in two dimensions can be formulated as particular Poisson sigma models. Target space diffeomorphisms map different models to each other and establish a one-to-one correspondence between their classical solutions. We obtai…
View article: dS$\boldsymbol{_2}$ as excitation of AdS$\boldsymbol{_2}$
dS$\boldsymbol{_2}$ as excitation of AdS$\boldsymbol{_2}$ Open
We introduce a family of 2D dilaton gravity models with state-dependent constant curvature so that dS _2 emerges as an excitation of AdS _2 . Curiously, the strong coupling region corresponds to the asymptotic region geometrically. A…
View article: Report on 2204.00045v1
Report on 2204.00045v1 Open
We introduce a family of 2D dilaton gravity models with state-dependent constant curvature so that dS 2 emerges as an excitation of AdS 2 .Curiously, the strong coupling region corresponds to the asymptotic region geometrically.Apart from …
View article: dS$\boldsymbol{_2}$ as excitation of AdS$\boldsymbol{_2}$
dS$\boldsymbol{_2}$ as excitation of AdS$\boldsymbol{_2}$ Open
We introduce a family of 2D dilaton gravity models with state-dependent constant curvature so that dS$_2$ emerges as an excitation of AdS$_2$. Curiously, the strong coupling region corresponds to the asymptotic region geometrically. Apart …
View article: Status of the Carbon Ion Source Commissioning at MedAustron
Status of the Carbon Ion Source Commissioning at MedAustron Open
MedAustron is a synchrotron-based Ion therapy center situated in lower Austria. Accelerated proton beams with energies of 62-252 MeV/u are used to treat patients with cancer since 2016. Carbon ion beam is currently under commissioning and …