Pith. Sign in

RECORD

Dynamic Cosmic Strings II: Numerical evolution of excited Cosmic Strings

PaperPDF from arXiv

data files

Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
X Bluesky LinkedIn Reddit Hacker News
U.Sperhake, K. R. P. Sjodin, J. A. Vickers

General Relativity and Quantum Cosmology · Submitted 31 Mar 2000

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim The interaction causes the string to oscillate at frequencies inversely proportional to the masses of the scalar and vector fields of the string.

how it is stated · asserted 1.00 read the record →

Comment (0) Read on arXiv ↗
Cite ▾
arXiv IDgr-qc/0003114 (version 2)
Pith ID56ZKFFOG, Pith's permanent record of this paper and its review
CitationJ. A. Vickers, K. R. P. Sjodin, U.Sperhake. "Dynamic Cosmic Strings II: Numerical evolution of excited Cosmic Strings." arXiv:gr-qc/0003114 (2000). https://pith.science/paper/56ZKFFOG
Claim paper

The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

Open the compiled record

Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,515 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.10 · human participants 0.01 · controlled comparison 0.16 · randomized assignment 0.01 · states quantitative result 0.49 · compares with prior results 0.71 · mentions code or data availability 0.03.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; .

An implicit, fully characteristic, numerical scheme for solving the field equations of a cosmic string coupled to gravity is described. The inclusion of null infinity as part of the numerical grid allows us to apply suitable boundary conditions on the metric and matter fields to suppress unphysical divergent solutions. The code is tested by comparing the results with exact solutions, checking that static cosmic string initial data remain constant when evolved and undertaking a time dependent convergence analysis of the code. It is shown that the code is accurate, stable and exhibits clear second order convergence. The code is used to analyse the interaction between a Weber--Wheeler pulse of gravitational radiation with the string. The interaction causes the string to oscillate at frequencies inversely proportional to the masses of the scalar and vector fields of the string. After the pulse has largely radiated away the string continues to ring but the oscillations slowly decay and eventually the variables return to their static values.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 An implicit, fully characteristic, numerical scheme for solving the field equations of a cosmic string coupled to gravity is described. method 0.93 0.88 0.05 asserted 0.98
s1 The inclusion of null infinity as part of the numerical grid allows us to apply suitable boundary conditions on the metric and matter fields to suppress unphysical divergent solutions. method 0.98 0.85 0.04 asserted 0.99
s2 The code is tested by comparing the results with exact solutions, checking that static cosmic string initial data remain constant when evolved and undertaking a time dependent convergence analysis of the code. method 0.88 0.95 0.05 asserted 0.90
s3 It is shown that the code is accurate, stable and exhibits clear second order convergence. result 0.95 0.95 0.18 asserted 1.00
s4 The code is used to analyse the interaction between a Weber--Wheeler pulse of gravitational radiation with the string. contribution 0.90 0.92 0.07 asserted 0.99
s5 The interaction causes the string to oscillate at frequencies inversely proportional to the masses of the scalar and vector fields of the string. result 1.00 0.89 0.32 asserted 1.00
s6 After the pulse has largely radiated away the string continues to ring but the oscillations slowly decay and eventually the variables return to their static values. result 1.00 0.92 0.22 asserted 1.00

What kind of paper the classifier reports this is: simulation study 0.67 · evidence from simulation or computation 1.00.

What was examined, and what was not

sources read
  • arXiv listing abstract v2
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
levels run
  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

An implicit, fully characteristic, numerical scheme for solving the field equations of a cosmic string coupled to gravity is described. The inclusion of null infinity as part of the numerical grid allows us to apply suitable boundary conditions on the metric and matter fields to suppress unphysical divergent solutions. The code is tested by comparing the results with exact solutions, checking that static cosmic string initial data remain constant when evolved and undertaking a time dependent convergence analysis of the code. It is shown that the code is accurate, stable and exhibits clear second order convergence. The code is used to analyse the interaction between a Weber--Wheeler pulse of gravitational radiation with the string. The interaction causes the string to oscillate at frequencies inversely proportional to the masses of the scalar and vector fields of the string. After the pulse has largely radiated away the string continues to ring but the oscillations slowly decay and eventually the variables return to their static values.

Human review

How Pith checks papers → · Full audit of this paper →

How the literature uses it

2 arXiv papers cite this in 3 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Discussion

Know something about this paper? Leave a comment, or highlight any passage above to comment on it.