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Scaling of cosmic string loops
General Relativity and Quantum Cosmology · Submitted 29 Nov 2005
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim In this final regime the characteristic length of loops scales as $0.1 t$, in contrast to earlier simulations which found tiny loops.
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The abstract, sentence by sentence
We study the spectrum of loops as a part of a complete network of cosmic strings in flat spacetime. After a long transient regime, characterized by production of small loops at the scale of the initial conditions, it appears that a true scaling regime takes over. In this final regime the characteristic length of loops scales as $0.1 t$, in contrast to earlier simulations which found tiny loops. We expect the expanding-universe behavior to be qualitatively similar. The large loop sizes have important cosmological implications. In particular, the nucleosynthesis bound becomes $G\mu \lesssim 10^{-7}$, much tighter than before.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We study the spectrum of loops as a part of a complete network of cosmic strings in flat spacetime. | contribution 0.99 | 0.87 | 0.04 | asserted 0.75 |
| s1 | After a long transient regime, characterized by production of small loops at the scale of the initial conditions, it appears that a true scaling regime takes over. | result 1.00 | 0.81 | 0.17 | asserted 0.88 |
| s2 | In this final regime the characteristic length of loops scales as $0.1 t$, in contrast to earlier simulations which found tiny loops. | result 1.00 | 0.86 | 0.73 | asserted 1.00 |
| s3 | We expect the expanding-universe behavior to be qualitatively similar. | interpretation 0.93 | 0.17 | 0.05 | speculative 0.59 |
| s4 | The large loop sizes have important cosmological implications. | interpretation 1.00 | 0.28 | 0.13 | asserted 1.00 |
| s5 | In particular, the nucleosynthesis bound becomes $G\mu \lesssim 10^{-7}$, much tighter than before. | interpretation 0.90 | 0.66 | 0.23 | asserted 0.99 |
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The paper
Original abstract
We study the spectrum of loops as a part of a complete network of cosmic strings in flat spacetime. After a long transient regime, characterized by production of small loops at the scale of the initial conditions, it appears that a true scaling regime takes over. In this final regime the characteristic length of loops scales as $0.1 t$, in contrast to earlier simulations which found tiny loops. We expect the expanding-universe behavior to be qualitatively similar. The large loop sizes have important cosmological implications. In particular, the nucleosynthesis bound becomes $G\mu \lesssim 10^{-7}$, much tighter than before.
Human review
References
How later papers used it
62 later papers cite it
3 later papers by other authors are listed below: 3 used its data or values.
Uses its data or values 3 of 14 papers with this label
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Chose its loop size to match the maximum size of loops obtained in numerical simulations by this paper.
Gravitational waves from melting cosmic strings (2021) · 0.91 · paraphrased: the licence does not allow quoting
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Took the large value for alpha of about 0.1 suggested recently by this paper.
Energy Radiation by Cosmic Superstrings in Brane Inflation (2007) · 0.96 · paraphrased: the licence does not allow quoting
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Used the value of about 0.1 around which this paper found the loop production functions to peak.
Gravitational-Wave Stochastic Background from Kinks and Cusps on Cosmic Strings (2010) · 0.98 · paraphrased: the licence does not allow quoting
How the literature uses it
57 arXiv papers cite this in 93 sentences
Papers citing it · 64 sentences without a confident label
Uses its method or tool 2 papers
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We also calculate the angular power spectrum, assuming scaling in loop distribution [ref] .
21 cm Angular Spectrum of Cosmic String Loops · Introduction · 0.81
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For details on the algorithm see [ref] .
A new parallel simulation technique · Semi-parallel cosmic string simulation · 0.84
Uses its data or values 14 papers
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We have taken $ℱ ≃0.1$, $α≃0.1$, $C_eff = 5.7$ for the radiation-dominated universe [ref] , and $q=4/3$ because of cusp domination in the gravitational wave spectrum [ref] .
Gravitational Waves from hybrid defects as probe of Flavor symmetry breaking: Machine-Learning Approach · Gravitational Wave Gastronomy: Walls bounded by Strings · 0.97
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We have taken $ℱ ≃0.1$, $α≃0.1$, $C_eff = 5.7$ for the radiation-dominated universe [ref] , and $q=4/3$ because of cusp domination in the gravitational wave spectrum [ref] .
Gravitational waves from walls bounded by strings in $SO(10)$ model of pseudo-Goldstone dark matter · Gravitational wave background · 0.97
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Assuming that about 10% of the $(±13, ∓9)_0$ string loops are large enough to survive against Hubble damping and contribute to GW emission, and presuming that the loop formation rate balances the energy-loss rate of the network, the formation rate of loops of size $α$ is given by [ref] [equation] Based on lattice simulations, the best-fit values of these parameters are: $F_α≃α=0.1$, $c̃ ≃5.7$ and $0.5$ in the radiation and matter dominated epoch, respectively [ref] .
Gravitational Wave Imprints of a High-Quality Axion and the Origin of Flavor Hierarchies · Introduction · 0.97
Compares with it 1 paper
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However, comparing with the numerical simulations of Refs. [ref] that treatment did seem to find the correct functional form for the loop production function.
Analytic Approaches to the Study of Small Scale Structure on Cosmic String Networks · Preliminary considerations · 0.93
Cites it as support 1 paper
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Second, small loops, if abundantly produced, initially exhibit a strong departure from the scaling regime, which persists for a longer time compared to large loops [ref] .
Gravitational waves from melting cosmic strings · Number density of cosmic string loops · 0.98
Cites it as background 7 papers
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Estimates of the size of cosmic string loops are uncertain to many orders of magnitudes, ranging from near-horizon scales [ref] down to the gravitational radiation length scale [ref] , and even to microscopic scales [ref] .
Cosmic String Loops, Large and Small · Introduction · 0.99
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This issue is still under debate, see e.g. [ref] .
Cosmic Super-Strings and Kaluza-Klein Modes · Consequences for the Loop Number Density and the Friction-Dominated Epoch · 0.91
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Cosmological simulations of both types, lattice field theory [ref] and Nambu-Goto dynamics [ref] , have been extensively studied in the past.
Nambu-Goto Dynamics of Field Theory Cosmic String Loops · Introduction · 1.00
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