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Speeding up N-body simulations of modified gravity: chameleon screening models
Bose, Sownak1; Li, Baojiu1; Barreira, Alexandre2; He, Jian-hua1; Hellwing, Wojciech A.3,4; Koyama, Kazuya3; Llinares, Claudio1; Zhao, Gong-Bo3,5
2017-02-01
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号2
摘要We describe and demonstrate the potential of a new and very efficient method for simulating certain classes of modified gravity theories, such as the widely studied f(R) gravity models. High resolution simulations for such models are currently very slow due to the highly nonlinear partial differential equation that needs to be solved exactly to predict the modified gravitational force. This nonlinearity is partly inherent, but is also exacerbated by the specific numerical algorithm used, which employs a variable redefinition to prevent numerical instabilities. The standard Newton-Gauss-Seidel iterative method used to tackle this problem has a poor convergence rate. Our new method not only avoids this, but also allows the discretised equation to be written in a form that is analytically solvable. We show that this new method greatly improves the performance and efficiency of f(R) simulations. For example, a test simulation with 512(3) particles in a box of size 512 Mpc/h is now 5 times faster than before, while a Millennium-resolution simulation for f(R) gravity is estimated to be more than 20 times faster than with the old method. Our new implementation will be particularly useful for running very high resolution, large-sized simulations which, to date, are only possible for the standard model, and also makes it feasible to run large numbers of lower resolution simulations for covariance analyses. We hope that the method will bring us to a new era for precision cosmological tests of gravity.
文章类型Article
关键词Cosmological Simulations Dark Matter Simulations Modified Gravity
WOS标题词Science & Technology ; Physical Sciences
资助者STFC(ST/K501979/1 ; STFC(ST/K501979/1 ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; European Research Council(646702) ; European Research Council(646702) ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; Australian Government ; Australian Government ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; Durham University ; Durham University ; National Science Foundation(PHY-1066293) ; National Science Foundation(PHY-1066293) ; ST/L00075X/1 ; ST/L00075X/1 ; RF040365 ; RF040365 ; ST/N000668/1 ; ST/N000668/1 ; ST/H008519/1 ; ST/H008519/1 ; ST/K003267/1) ; ST/K003267/1) ; STFC(ST/K501979/1 ; STFC(ST/K501979/1 ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; European Research Council(646702) ; European Research Council(646702) ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; Australian Government ; Australian Government ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; Durham University ; Durham University ; National Science Foundation(PHY-1066293) ; National Science Foundation(PHY-1066293) ; ST/L00075X/1 ; ST/L00075X/1 ; RF040365 ; RF040365 ; ST/N000668/1 ; ST/N000668/1 ; ST/H008519/1 ; ST/H008519/1 ; ST/K003267/1) ; ST/K003267/1)
DOI10.1088/1475-7516/2017/02/050
关键词[WOS]F(R) GRAVITY ; HUBBLE CONSTANT ; POWER SPECTRA ; DARK ENERGY ; LOCAL GROUP ; GALAXIES ; SPACE ; CODE ; CONSTRAINTS ; COSMOLOGY
收录类别SCI
语种英语
资助者STFC(ST/K501979/1 ; STFC(ST/K501979/1 ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; European Research Council(646702) ; European Research Council(646702) ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; Australian Government ; Australian Government ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; Durham University ; Durham University ; National Science Foundation(PHY-1066293) ; National Science Foundation(PHY-1066293) ; ST/L00075X/1 ; ST/L00075X/1 ; RF040365 ; RF040365 ; ST/N000668/1 ; ST/N000668/1 ; ST/H008519/1 ; ST/H008519/1 ; ST/K003267/1) ; ST/K003267/1) ; STFC(ST/K501979/1 ; STFC(ST/K501979/1 ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; European Research Council(646702) ; European Research Council(646702) ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; Australian Government ; Australian Government ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; Durham University ; Durham University ; National Science Foundation(PHY-1066293) ; National Science Foundation(PHY-1066293) ; ST/L00075X/1 ; ST/L00075X/1 ; RF040365 ; RF040365 ; ST/N000668/1 ; ST/N000668/1 ; ST/H008519/1 ; ST/H008519/1 ; ST/K003267/1) ; ST/K003267/1)
WOS研究方向Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000399455000050
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8388
专题星系宇宙学研究部
作者单位1.Univ Durham, Dept Phys, Inst Computat Cosmol, Durham DH1 3LE, England
2.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany
3.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England
4.Univ Zielona Gora, Janusz Gil Inst Astron, Ul Szafrana 2, PL-65516 Zielona Gora, Poland
5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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Bose, Sownak,Li, Baojiu,Barreira, Alexandre,et al. Speeding up N-body simulations of modified gravity: chameleon screening models[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2017(2).
APA Bose, Sownak.,Li, Baojiu.,Barreira, Alexandre.,He, Jian-hua.,Hellwing, Wojciech A..,...&Zhao, Gong-Bo.(2017).Speeding up N-body simulations of modified gravity: chameleon screening models.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2).
MLA Bose, Sownak,et al."Speeding up N-body simulations of modified gravity: chameleon screening models".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .2(2017).
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