GravitationalWavesfromScalarFieldFragmentation: UVSlopeasanObservableDiscriminator

We study the fragmentationof a scalarfieldT(x)witha tachyonicpotential and its gravitationalwave (GW) signature. Using1Dnumerical simulationsandtheHartreeap proximation,wedemonstratethat thetachyonic instabilityleads toexponential growthof fluctuations, followedbynonlinearsaturationandformationof localizedfieldconfigurations (lumps). This fragmentationprocessgeneratesastochasticgravitationalwavebackground withacharacteristicultravioletslopeΩGW(f)∝f−nwithn≃2−3,whichdistinguishes it fromfirst-orderphasetransitions(n∼1)andturbulence-drivensources(n∼5/3).We providesemi-analyticestimatesfortheGWamplitudeandfrequency,andshowthatthesig nalcanbedetectablebyLISA,EinsteinTelescope,andDECIGOforawiderangeofmodel parameters. TheUVslope serves as anobservablediscriminator for futuregravitational wavedetectors.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-06-16
DOI
https://doi.org/10.5281/zenodo.20719135
Primary Topic
Cosmology and Gravitation Theories
Type
article
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article

GravitationalWavesfromScalarFieldFragmentation: UVSlopeasanObservableDiscriminator

Alik Gimranov
Zenodo (CERN European Organization for Nuclear Research)
Cosmology and Gravitation Theories
article

GravitationalWavesfromScalarFieldFragmentation: UVSlopeasanObservableDiscriminator

Alik Gimranov
article en

Abstract

We study the fragmentationof a scalarfieldT(x)witha tachyonicpotential and its gravitationalwave (GW) signature. Using1Dnumerical simulationsandtheHartreeap proximation,wedemonstratethat thetachyonic instabilityleads toexponential growthof fluctuations, followedbynonlinearsaturationandformationof localizedfieldconfigurations (lumps). This fragmentationprocessgeneratesastochasticgravitationalwavebackground withacharacteristicultravioletslopeΩGW(f)∝f−nwithn≃2−3,whichdistinguishes it fromfirst-orderphasetransitions(n∼1)andturbulence-drivensources(n∼5/3).We providesemi-analyticestimatesfortheGWamplitudeandfrequency,andshowthatthesig nalcanbedetectablebyLISA,EinsteinTelescope,andDECIGOforawiderangeofmodel parameters. TheUVslope serves as anobservablediscriminator for futuregravitational wavedetectors.

Zenodo (CERN European Organization for Nuclear Research)
Reduced inequalities
Openalex Percentile: Top 7%
Cosmology and Gravitation Theories
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