Lattice simulation of multi-stream inflation

@article{Cai2022LatticeSO,
  title={Lattice simulation of multi-stream inflation},
  author={Tingqi Cai and J. Jiang and Yi Wang},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2022},
  volume={2022}
}
We present the first lattice simulation to investigate the nature of multi-stream inflation. The simulation confirms the physical picture of multi-stream inflation, and with new findings in parameter space and field behaviors. Our simulation shows that gradient energy plays a significant role in multi-stream inflation. For a double field potential with a shifted Gaussian barrier, bifurcation probability is controlled by the shift distance with an error function relation. The bubbles created by… 
Cosmological Standard Timers from Unstable Primordial Relics
Yi-Fu Cai, 2, ∗ Chao Chen, † Qianhang Ding, 3, ‡ and Yi Wang 3, § Department of Astronomy, School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China CAS
Lattice Simulations of Abelian Gauge Fields coupled to Axion during Inflation
TLDR
This work uses a non-linear lattice simulation to study a model of axion inflation where the inflaton is coupled to a U(1) gauge field through Chern-Simons interaction and identifies a discretization scheme for which the growth of the gauge field on the lattice reproduces the one of continuous space with good precision.

References

SHOWING 1-10 OF 65 REFERENCES
JCAP 07
  • 033
  • 2009
Multi-Stream Inflation
We propose a "multi-stream" inflation model, which is a double field model with spontaneous breaking and restoration of an approximate symmetry. We calculate the density perturbation and
Lattice simulations of inflation
TLDR
This paper uses a lattice simulation to reproduce the well-known results of some simple models of single-field inflation, particularly for the scalar field perturbation.
Quantum-Field-Theoretic Simulation Platform for Observing the Fate of the False Vacuum
A framework for simulating nonperturbative effects of field theory using a quantum annealer is presented and implemented.
SCI
Ultrahigh-energy Gamma Rays and Gravitational Waves from Primordial Exotic Stellar Bubbles
We put forward a novel class of exotic celestial objects that can be produced through phase transitions occurred in the primordial Universe. These objects appear as bubbles of stellar sizes and can
and Y
  • Wang,
  • 2021
MON
A gigaparsec-scale local void and the Hubble tension
We explore the possibility of using a gigaparsec-scale local void to reconcile the Hubble tension. Such a gigaparsec-scale void can be produced by multi-stream inflation where different parts of the
Detectability of gravitational waves from the coalescence of massive primordial black holes with initial clustering
We show that the effect of initial non-Gaussian clustering can significantly enhance the event rate for primordial black hole (PBH) coalescence. The impact of such clustering is studied in a specific
...
1
2
3
4
5
...