# On the quantum stability of Q-balls

@article{Tranberg2014OnTQ, title={On the quantum stability of Q-balls}, author={Anders Tranberg and David J. Weir}, journal={Journal of High Energy Physics}, year={2014}, volume={2014}, pages={1-18} }

A bstractWe consider the evolution and decay of Q-balls under the influence of quantum fluctuations. We argue that the most important effect resulting from these fluctuations is the modification of the effective potential in which the Q-ball evolves. This is in addition to spontaneous decay into elementary particle excitations and fission into smaller Q-balls previously considered in the literature, which — like most tunnelling processes — are likely to be strongly suppressed. We illustrate the…

## 5 Citations

Numerical methods in non-perturbative quantum field theory

- Physics
- 2017

This thesis applies techniques of non-perturbative quantum field theory for solving both bosonic and fermionic systems dynamically on a lattice.
The methods are first implemented in a bosonic…

Oscillon lifetime in the presence of quantum fluctuations

- Physics
- 2014

A bstractWe consider the stability of oscillons in 2+1 space-time dimensions, in the presence of quantum fluctuations. Taking the oscillon to be the inhomogeneous mean field of a self-interacting…

Radiative corrections and instability of large Q-Balls

- Physics
- 2016

We discuss stability of Q-balls interacting with fermions in theory with small coupling constant g. We argue that for configurations with large global U(1)-charge Q the problem of classical stability…

Exact solutions, energy, and charge of stable Q-balls

- Physics
- 2015

In this work we deal with nontopological solutions of the Q-ball type in two spacetime dimensions. We study models of current interest, described by a Higgs-like and other, similar potentials which…

Recrudescence of massive fermion production by oscillons

- Physics, Geology
- 2016

A bstractWe bring together the physics of preheating, following a period of inflation, and the dynamics of non-topological solitons, namely oscillons. We show that the oscillating condensate that…

## References

SHOWING 1-10 OF 35 REFERENCES

The Physics of Q-balls

- Physics
- 2009

In this thesis we investigate the stationary properties and formation process of a class of nontopological solitons, namely Q-balls. We explore both the quantum-mechanical and classical stability of…

Introduction to Nonequilibrium Quantum Field Theory

- Physics
- 2004

There has been substantial progress in recent years in the quantitative understanding of the nonequilibrium time evolution of quantum fields. Important topical applications, in particular in high…

Dressing up the kink

- Physics
- 2004

Many quantum field theoretical models possess non-trivial solutions which are stable for topological reasons. We construct a self-consistent example for a self-interacting scalar field--the quantum…

Exact and Truncated Dynamics in Nonequilibrium Field Theory

- Physics
- 2000

Nonperturbative dynamics of quantum fields out of equilibrium is often described by the time evolution of a hierarchy of correlation functions, using approximation methods such as Hartree, large Nf,…

Kinks in the Hartree approximation

- Physics
- 2004

The topological defects of the lambda phi^4 theory, kink and antikink, are studied in the Hartree approximation. This allows us to discuss quantum effects on the defects in both stationary and…

Semiclassical decay of topological defects

- Physics
- 2008

Perturbative estimates suggest that extended topological defects such as cosmic strings emit few particles, but numerical simulations of the fields from which they are constructed suggest the…

Numerical simulations of fragmentation of the Affleck-Dine condensate

- Physics
- 2001

We present numerical simulations of fragmentation of the Affleck-Dine condensate in two spatial dimensions. We argue analytically that the final state should consist of both Q-balls and anti-Q-balls…

Thermalization in a Hartree ensemble approximation to quantum field dynamics

- Physics
- 2001

For homogeneous initial conditions, Hartree (gaussian) dynamical approximations are known to have problems with thermalization, because of insufficient scattering. We attempt to improve on this by…

Class of scalar-field soliton solutions in three space dimensions

- Physics
- 1976

A class of three-space-dimensional soliton solutions is given; these solitons are made of scalar fields and are of a nontopological nature. The necessary conditions for having such soliton solutions…