E. S. Raptakis

activity

20242026

collaborators

6 papers

hep-th2026

Duality-invariant (super)conformal higher-spin models

Sergei M. Kuzenko, Emmanouil S. N. Raptakis

We develop a general formalism of duality rotations for bosonic conformal spin- $s$ gauge fields, with $s \geq 2$ , in a conformally flat four-dimensional spacetime. In the $s = 1$ case…

hep-th2025

New superparticle models in AdS superspaces

Nowar E. Koning, Emmanouil S. N. Raptakis

Recently, new superparticle models have been proposed in the $N$ -extended four and five-dimensional anti-de Sitter (AdS) superspaces, AdS $^{4∣4 N}$ and AdS$^{5|8…

hep-th2025

On three-dimensional $N = 4$ supersymmetry: maximally supersymmetric backgrounds and massive deformations

Sergei M. Kuzenko, Emmanouil S. N. Raptakis, Igor B. Samsonov +1

Using the $S O (N)$ superspace formulation for $N$ -extended conformal supergravity in three dimensions, we derive all maximally supersymmetric backgrounds in the ${\cal…

hep-th2025

$N = 3$ nonlinear multiplet and supergravity

Sergei M. Kuzenko, Emmanouil S. N. Raptakis

We propose an $N = 3$ nonlinear multiplet coupled to conformal supergravity and use it to formulate the equations of motion for $N = 3$ PoincarÃ© supergravity.…

hep-th2025

The anti-de Sitter supergeometry revisited

Nowar E. Koning, Sergei M. Kuzenko, Emmanouil S. N. Raptakis

In a supergravity framework, the $N$ -extended anti-de Sitter (AdS) superspace in four spacetime dimensions, $AdS^{4∣4 N}$ , is a maximally symmetric background that…

hep-th2024

Embedding formalism for $N$ -extended AdS superspace in four dimensions

Nowar E. Koning, Sergei M. Kuzenko, Emmanouil S. N. Raptakis

The supertwistor and bi-supertwistor formulations for $N$ -extended anti-de Sitter (AdS) superspace in four dimensions, $AdS^{4∣4 N}$ , were derived two year…

Duality-invariant (super)conformal higher-spin models

New superparticle models in AdS superspaces

On three-dimensional N=4 supersymmetry: maximally supersymmetric backgrounds and massive deformations

N=3 nonlinear multiplet and supergravity

The anti-de Sitter supergeometry revisited

Embedding formalism for N-extended AdS superspace in four dimensions

On three-dimensional $N = 4$ supersymmetry: maximally supersymmetric backgrounds and massive deformations

$N = 3$ nonlinear multiplet and supergravity

Embedding formalism for $N$ -extended AdS superspace in four dimensions