Ya Shnir

collaborators

7 papers

hep-th2026

Stress stability criterion of the isospinning $C P^{2}$ solitons

Sergei Antsipovich, Yakov Shnir

We study the energy-momentum tensor of stationary rotating topological solitons in a (2 + 1)-dimensional $C P^{2}$ nonlinear sigma model with a stabilizing potential term. We…

hep-th2026

Linearized Q-Ball Perturbations

Jarah Evslin, Hui Liu, Tomasz RomaÅczukiewicz +3

Linearized deformations of the thick-walled (low-amplitude) (1+1)-dimensional Q-ball may be decomposed into relativistic modes, which are roughly plane waves, and also long-wavelen…

hep-th2026

Stress stability criterion of $U (1)$ gauged non-topological solitons in the 3+1 dimensional O(3) sigma-model

Aliaksei Mikhaliuk, Yakov Shnir

We study the energy-momentum tensor of the spherically symmetric non-topological solitons of the $O (3)$ non-linear sigma-model with a standard kinetic term and with a symmetry brea…

hep-th2026

Two types of boson stars in $U (1)$ gauged $3 + 1$ -dimensional $O (3)$ sigma-model

Jutta Kunz, Aliaksei Mikhaliuk, Yakov Shnir

We investigate boson stars in an $O (3)$ scalar field theory with a symmetry-breaking potential. By constructing numerically spherically symmetric solutions, we demonstrate that the…

hep-th2025

$U (1)$ gauged non-topological solitons in the 3+1 dimensional $O (3)$ sigma-model

Luiz A. Ferreira, Aliaksei Mikhaliuk, Yakov Shnir

We present and study new non-topological soliton solutions in the $U (1)$ gauged non-linear $O (3)$ sigma model with a symmetry breaking potential in 3+1 dimensional flat space-time.…

hep-th2025

Boson stars in the $U (1)$ gauged 3+1 dimensional $O (3)$ sigma-model

Yakov Shnir, Aliaksei Mikhaliuk

We study regular self-gravitating non-topological soliton solutions of the $U (1)$ gauged non-linear $O (3)$ sigma model with the usual kinetic term and a simple symmetry breaking po…

Stress stability criterion of the isospinning CP2 solitons

Linearized Q-Ball Perturbations

Stress stability criterion of U(1) gauged non-topological solitons in the 3+1 dimensional O(3) sigma-model

Two types of boson stars in U(1) gauged 3+1-dimensional O(3) sigma-model

U(1) gauged non-topological solitons in the 3+1 dimensional O(3) sigma-model

Boson stars in the U(1) gauged 3+1 dimensional O(3) sigma-model

Stress stability criterion of the isospinning $C P^{2}$ solitons

Stress stability criterion of $U (1)$ gauged non-topological solitons in the 3+1 dimensional O(3) sigma-model

Two types of boson stars in $U (1)$ gauged $3 + 1$ -dimensional $O (3)$ sigma-model

$U (1)$ gauged non-topological solitons in the 3+1 dimensional $O (3)$ sigma-model

Boson stars in the $U (1)$ gauged 3+1 dimensional $O (3)$ sigma-model