Oscillon lifetime in the presence of quantum fluctuations

Saffin, Paul M.; Tognarelli, Paul; Tranberg, Anders

doi:10.1007/jhep08(2014)125

Cited by 27 publications

(22 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quantum Effects/ Short-Wavelength Stability Analysis: We have carried out a calculation of the classical decay rate. As discussed in [48,68] (also see [69]), the presence of quantum fluctuations might reduce the lifetime. Heuristically, the exponential suppression in the decay rates arising from [S j (κ j )] 2 might be absent when one includes quantum fluctuations -although the analysis in our large/moderate amplitude limit remains to be done carefully.…”

Section: Asymmetric Potentialsmentioning

confidence: 94%

Classical decay rates of oscillons

Zhang

Amin

Copeland

et al. 2020

J. Cosmol. Astropart. Phys.

Self Cite

139

View full text Add to dashboard Cite

Oscillons are extremely long-lived, spatially-localized field configurations in real-valued scalar field theories that slowly lose energy via radiation of scalar waves. Before their eventual demise, oscillons can pass through (one or more) exceptionally stable field configurations where their decay rate is highly suppressed. We provide an improved calculation of the non-trivial behavior of the decay rates, and lifetimes of oscillons. In particular, our calculation correctly captures the existence (or absence) of the exceptionally long-lived states for large amplitude oscillons in a broad class of potentials, including non-polynomial potentials that flatten at large field values. The key underlying reason for the improved (by many orders of magnitude in some cases) calculation is the systematic inclusion of a spacetime-dependent effective mass term in the equation describing the radiation emitted by oscillons (in addition to a source term). Our results for the exceptionally stable configurations, decay rates, and lifetime of large amplitude oscillons (in some cases 10 8 oscillations) in such flattened potentials might be relevant for cosmological applications.

show abstract

Section: Asymmetric Potentialsmentioning

confidence: 94%

Classical decay rates of oscillons

Zhang

Amin

Copeland

et al. 2020

J. Cosmol. Astropart. Phys.

Self Cite

139

View full text Add to dashboard Cite

show abstract

“…However, during their entire lifetime oscillons can produce GWs also due to the interactions and collisions among each other (Helfer et al 2019). Oscillons are very long-lived: their lifetime is model-dependent but typically J10 4 =m (Gleiser and Sicilia 2008;Amin and Shirokoff 2010;Amin et al , 2012Salmi and Hindmarsh 2012;Saffin et al 2014;Antusch et al 2019;Gleiser and Krackow 2019;Zhang et al 2020), where m is the mass of the scalar field. Oscillons eventually decay through classical (Segur and Kruskal 1987) or quantum radiation (Hertzberg 2010).…”

Section: (P)reheatingmentioning

confidence: 99%

Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies

et al. 2021

View full text Add to dashboard Cite

The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines the challenges and gains expected in gravitational-wave searches at frequencies above the LIGO/Virgo band, with a particular focus on Ultra High-Frequency Gravitational Waves (UHF-GWs), covering the MHz to GHz range. The absence of known astrophysical sources in this frequency range provides a unique opportunity to discover physics beyond the Standard Model operating both in the early and late Universe, and we highlight some of the most promising gravitational sources. We review several detector concepts that have been proposed to take up this challenge, and compare their expected sensitivity with the signal strength predicted in various models. This report is the summary of the workshop “Challenges and opportunities of high-frequency gravitational wave detection” held at ICTP Trieste, Italy in October 2019, that set up the stage for the recently launched Ultra-High-Frequency Gravitational Wave (UHF-GW) initiative.

show abstract

“…A numerical study of the lifetime and stability of large amplitude relativistic oscillons (but without gravitational interactions) in flattened potentials like the one we use here has been discussed in [57]. A more detailed connection between non-relativistic solitons and oscillons, as well as analysis of the stability of relativistic cases (typically for small amplitude) can be seen in [58,[75][76][77]. .…”

Section: Non-relativistic Solitons and Oscillonsmentioning

confidence: 99%

Formation, gravitational clustering, and interactions of nonrelativistic solitons in an expanding universe

2019

View full text Add to dashboard Cite

We investigate the formation, gravitational clustering, and interactions of solitons in a selfinteracting, non-relativistic scalar field in an expanding universe. Rapid formation of a large number of solitons is driven by attractive self-interactions of the field, whereas the slower clustering of solitons is driven by gravitational forces. Driven closer together by gravity, we see a rich plethora of dynamics in the soliton "gas" including mergers, scatterings and formation of soliton binaries. The numerical simulations are complemented by analytic calculations and estimates of (i) the relevant instability length and time scales, (ii) individual soliton profiles and their stability, (iii) number density of produced solitons, and (iv) the two-point correlation function of soliton positions as evidence for gravitational clustering. * mustafa.a.amin@gmail.com † philip.mocz@gmail.com; Einstein Fellow 1 Here, by cosmological initial conditions we mean an almost homogeneous field with small perturbations.

show abstract

Oscillon lifetime in the presence of quantum fluctuations

Cited by 27 publications

References 32 publications

Classical decay rates of oscillons

Classical decay rates of oscillons

Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies

Formation, gravitational clustering, and interactions of nonrelativistic solitons in an expanding universe

Contact Info

Product

Resources

About