The Experts below are selected from a list of 150723 Experts worldwide ranked by ideXlab platform
Jiamin Hou - One of the best experts on this subject based on the ideXlab platform.
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the clustering of the sdss iv extended baryon oscillation spectroscopic survey dr14 quasar sample anisotropic clustering analysis in Configuration Space
Monthly Notices of the Royal Astronomical Society, 2018Co-Authors: Jiamin Hou, Ariel G Sanchez, Roman Scoccimarro, Salvador Salazaralbornoz, Etienne Burtin, Hector Gilmarin, Will J Percival, Rossana RuggeriAbstract:We explore the cosmological implications of anisotropic clustering measurements of the quasar sample from Data Release 14 (DR14) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) in Configuration Space. The ~147 000 quasar sample observed by eBOSS offers a direct tracer of the density field and bridges the gap of previous baryon acoustic oscillation measurements between redshift 0.8 < z < 2.2. By analysing the two-point correlation function characterized by clustering wedges ξ (s) and multipoles ξl(s), we measure the angular diameter distance, Hubble parameter, and cosmic structure growth rate. We define a systematic error budget for our measurements based on the analysis of N-body simulations and mock catalogues. Based on the DR14 large-scale structure quasar sample at the effective redshift z = 1.52, we find the growth rate of cosmic structure fσ(z) = 0.396 ± 0.079, and the geometric parameters D(z)/r = 26.47 ± 1.23, and FAP(z) = 2.53 ± 0.22, where the uncertainties include both statistical and systematic errors. These values are in excellent agreement with the best-fitting standard Λ cold dark matter model to the latest cosmic microwave background data from Planck.
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the clustering of the sdss iv extended baryon oscillation spectroscopic survey dr14 quasar sample anisotropic clustering analysis in Configuration Space
Monthly Notices of the Royal Astronomical Society, 2018Co-Authors: Jiamin Hou, Ariel G Sanchez, Roman Scoccimarro, Salvador Salazaralbornoz, Etienne Burtin, Hector Gilmarin, Will J PercivalAbstract:We explore the cosmological implications of anisotropic clustering measurements of the quasar sample from Data Release 14 (DR14) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) in Configuration Space. The |${\sim } 147\, 000$| quasar sample observed by eBOSS offers a direct tracer of the density field and bridges the gap of previous baryon acoustic oscillation measurements between redshift 0.8 < |$z$| < 2.2. By analysing the two-point correlation function characterized by clustering wedges |$\xi _{\rm w_i}(s)$| and multipoles ξ_l(s), we measure the angular diameter distance, Hubble parameter, and cosmic structure growth rate. We define a systematic error budget for our measurements based on the analysis of N-body simulations and mock catalogues. Based on the DR14 large-scale structure quasar sample at the effective redshift |$z$|_eff = 1.52, we find the growth rate of cosmic structure fσ_8(|$z$|_eff) = 0.396 ± 0.079, and the geometric parameters D_V(|$z$|)/r_d = 26.47 ± 1.23, and F_AP(|$z$|) = 2.53 ± 0.22, where the uncertainties include both statistical and systematic errors. These values are in excellent agreement with the best-fitting standard Λ cold dark matter model to the latest cosmic microwave background data from Planck.
Chuang Wang - One of the best experts on this subject based on the ideXlab platform.
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ground state Configuration Space heterogeneity of random finite connectivity spin glasses and random constraint satisfaction problems
Journal of Statistical Mechanics: Theory and Experiment, 2010Co-Authors: Haijun Zhou, Chuang WangAbstract:We demonstrate through two case studies, one on the p-spin interaction model and the other on the random K-satisfiability problem, that a heterogeneity transition occurs to the ground-state Configuration Space of a random finite-connectivity spin glass system at a certain critical value of the constraint density. At the transition point, exponentially many Configuration communities emerge from the ground-state Configuration Space, making the entropy density s(q) of Configuration-pairs a non-concave function of the Configuration-pair overlap q. Each Configuration community is a collection of relatively similar Configurations and it forms a stable thermodynamic phase in the presence of a suitable external field. We calculate s(q) by the replicasymmetric and the first-step replica-symmetry-broken cavity methods, and show by simulations that the Configuration Space heterogeneity leads to dynamical heterogeneity of particle diffusion processes because of the entropic trapping effect of Configuration communities. This work clarifies the fine structure of the ground-state Configuration Space of random spin glass models, it also sheds light on the glassy behavior of hard-sphere colloidal systems at relatively high particle volume fractions.
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ground state Configuration Space heterogeneity of random finite connectivity spin glasses and random constraint satisfaction problems
arXiv: Disordered Systems and Neural Networks, 2010Co-Authors: Haijun Zhou, Chuang WangAbstract:We demonstrate through two case studies, one on the p-spin interaction model and the other on the random K-satisfiability problem, that a heterogeneity transition occurs to the ground-state Configuration Space of a random finite-connectivity spin glass system at certain critical value of the constraint density. At the transition point, exponentially many Configuration communities emerge from the ground-state Configuration Space, making the entropy density s(q) of Configuration-pairs a non-concave function of Configuration-pair overlap q. Each Configuration community is a collection of relatively similar Configurations and it forms a stable thermodynamic phase in the presence of a suitable external field. We calculate s(q) by the replica-symmetric and the first-step replica-symmetry-broken cavity methods, and show by simulations that the Configuration Space heterogeneity leads to dynamical heterogeneity of particle diffusion processes because of the entropic trapping effect of Configuration communities. This work clarifies the fine structure of the ground-state Configuration Space of random spin glass models, it also sheds light on the glassy behavior of hard-sphere colloidal systems at relatively high particle volume fraction.
Salvador Salazaralbornoz - One of the best experts on this subject based on the ideXlab platform.
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the clustering of the sdss iv extended baryon oscillation spectroscopic survey dr14 quasar sample anisotropic clustering analysis in Configuration Space
Monthly Notices of the Royal Astronomical Society, 2018Co-Authors: Jiamin Hou, Ariel G Sanchez, Roman Scoccimarro, Salvador Salazaralbornoz, Etienne Burtin, Hector Gilmarin, Will J Percival, Rossana RuggeriAbstract:We explore the cosmological implications of anisotropic clustering measurements of the quasar sample from Data Release 14 (DR14) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) in Configuration Space. The ~147 000 quasar sample observed by eBOSS offers a direct tracer of the density field and bridges the gap of previous baryon acoustic oscillation measurements between redshift 0.8 < z < 2.2. By analysing the two-point correlation function characterized by clustering wedges ξ (s) and multipoles ξl(s), we measure the angular diameter distance, Hubble parameter, and cosmic structure growth rate. We define a systematic error budget for our measurements based on the analysis of N-body simulations and mock catalogues. Based on the DR14 large-scale structure quasar sample at the effective redshift z = 1.52, we find the growth rate of cosmic structure fσ(z) = 0.396 ± 0.079, and the geometric parameters D(z)/r = 26.47 ± 1.23, and FAP(z) = 2.53 ± 0.22, where the uncertainties include both statistical and systematic errors. These values are in excellent agreement with the best-fitting standard Λ cold dark matter model to the latest cosmic microwave background data from Planck.
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the clustering of the sdss iv extended baryon oscillation spectroscopic survey dr14 quasar sample anisotropic clustering analysis in Configuration Space
Monthly Notices of the Royal Astronomical Society, 2018Co-Authors: Jiamin Hou, Ariel G Sanchez, Roman Scoccimarro, Salvador Salazaralbornoz, Etienne Burtin, Hector Gilmarin, Will J PercivalAbstract:We explore the cosmological implications of anisotropic clustering measurements of the quasar sample from Data Release 14 (DR14) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) in Configuration Space. The |${\sim } 147\, 000$| quasar sample observed by eBOSS offers a direct tracer of the density field and bridges the gap of previous baryon acoustic oscillation measurements between redshift 0.8 < |$z$| < 2.2. By analysing the two-point correlation function characterized by clustering wedges |$\xi _{\rm w_i}(s)$| and multipoles ξ_l(s), we measure the angular diameter distance, Hubble parameter, and cosmic structure growth rate. We define a systematic error budget for our measurements based on the analysis of N-body simulations and mock catalogues. Based on the DR14 large-scale structure quasar sample at the effective redshift |$z$|_eff = 1.52, we find the growth rate of cosmic structure fσ_8(|$z$|_eff) = 0.396 ± 0.079, and the geometric parameters D_V(|$z$|)/r_d = 26.47 ± 1.23, and F_AP(|$z$|) = 2.53 ± 0.22, where the uncertainties include both statistical and systematic errors. These values are in excellent agreement with the best-fitting standard Λ cold dark matter model to the latest cosmic microwave background data from Planck.
Haijun Zhou - One of the best experts on this subject based on the ideXlab platform.
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ground state Configuration Space heterogeneity of random finite connectivity spin glasses and random constraint satisfaction problems
Journal of Statistical Mechanics: Theory and Experiment, 2010Co-Authors: Haijun Zhou, Chuang WangAbstract:We demonstrate through two case studies, one on the p-spin interaction model and the other on the random K-satisfiability problem, that a heterogeneity transition occurs to the ground-state Configuration Space of a random finite-connectivity spin glass system at a certain critical value of the constraint density. At the transition point, exponentially many Configuration communities emerge from the ground-state Configuration Space, making the entropy density s(q) of Configuration-pairs a non-concave function of the Configuration-pair overlap q. Each Configuration community is a collection of relatively similar Configurations and it forms a stable thermodynamic phase in the presence of a suitable external field. We calculate s(q) by the replicasymmetric and the first-step replica-symmetry-broken cavity methods, and show by simulations that the Configuration Space heterogeneity leads to dynamical heterogeneity of particle diffusion processes because of the entropic trapping effect of Configuration communities. This work clarifies the fine structure of the ground-state Configuration Space of random spin glass models, it also sheds light on the glassy behavior of hard-sphere colloidal systems at relatively high particle volume fractions.
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ground state Configuration Space heterogeneity of random finite connectivity spin glasses and random constraint satisfaction problems
arXiv: Disordered Systems and Neural Networks, 2010Co-Authors: Haijun Zhou, Chuang WangAbstract:We demonstrate through two case studies, one on the p-spin interaction model and the other on the random K-satisfiability problem, that a heterogeneity transition occurs to the ground-state Configuration Space of a random finite-connectivity spin glass system at certain critical value of the constraint density. At the transition point, exponentially many Configuration communities emerge from the ground-state Configuration Space, making the entropy density s(q) of Configuration-pairs a non-concave function of Configuration-pair overlap q. Each Configuration community is a collection of relatively similar Configurations and it forms a stable thermodynamic phase in the presence of a suitable external field. We calculate s(q) by the replica-symmetric and the first-step replica-symmetry-broken cavity methods, and show by simulations that the Configuration Space heterogeneity leads to dynamical heterogeneity of particle diffusion processes because of the entropic trapping effect of Configuration communities. This work clarifies the fine structure of the ground-state Configuration Space of random spin glass models, it also sheds light on the glassy behavior of hard-sphere colloidal systems at relatively high particle volume fraction.
Will J Percival - One of the best experts on this subject based on the ideXlab platform.
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the clustering of the sdss iv extended baryon oscillation spectroscopic survey dr14 quasar sample anisotropic clustering analysis in Configuration Space
Monthly Notices of the Royal Astronomical Society, 2018Co-Authors: Jiamin Hou, Ariel G Sanchez, Roman Scoccimarro, Salvador Salazaralbornoz, Etienne Burtin, Hector Gilmarin, Will J Percival, Rossana RuggeriAbstract:We explore the cosmological implications of anisotropic clustering measurements of the quasar sample from Data Release 14 (DR14) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) in Configuration Space. The ~147 000 quasar sample observed by eBOSS offers a direct tracer of the density field and bridges the gap of previous baryon acoustic oscillation measurements between redshift 0.8 < z < 2.2. By analysing the two-point correlation function characterized by clustering wedges ξ (s) and multipoles ξl(s), we measure the angular diameter distance, Hubble parameter, and cosmic structure growth rate. We define a systematic error budget for our measurements based on the analysis of N-body simulations and mock catalogues. Based on the DR14 large-scale structure quasar sample at the effective redshift z = 1.52, we find the growth rate of cosmic structure fσ(z) = 0.396 ± 0.079, and the geometric parameters D(z)/r = 26.47 ± 1.23, and FAP(z) = 2.53 ± 0.22, where the uncertainties include both statistical and systematic errors. These values are in excellent agreement with the best-fitting standard Λ cold dark matter model to the latest cosmic microwave background data from Planck.
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the clustering of the sdss iv extended baryon oscillation spectroscopic survey dr14 quasar sample anisotropic clustering analysis in Configuration Space
Monthly Notices of the Royal Astronomical Society, 2018Co-Authors: Jiamin Hou, Ariel G Sanchez, Roman Scoccimarro, Salvador Salazaralbornoz, Etienne Burtin, Hector Gilmarin, Will J PercivalAbstract:We explore the cosmological implications of anisotropic clustering measurements of the quasar sample from Data Release 14 (DR14) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) in Configuration Space. The |${\sim } 147\, 000$| quasar sample observed by eBOSS offers a direct tracer of the density field and bridges the gap of previous baryon acoustic oscillation measurements between redshift 0.8 < |$z$| < 2.2. By analysing the two-point correlation function characterized by clustering wedges |$\xi _{\rm w_i}(s)$| and multipoles ξ_l(s), we measure the angular diameter distance, Hubble parameter, and cosmic structure growth rate. We define a systematic error budget for our measurements based on the analysis of N-body simulations and mock catalogues. Based on the DR14 large-scale structure quasar sample at the effective redshift |$z$|_eff = 1.52, we find the growth rate of cosmic structure fσ_8(|$z$|_eff) = 0.396 ± 0.079, and the geometric parameters D_V(|$z$|)/r_d = 26.47 ± 1.23, and F_AP(|$z$|) = 2.53 ± 0.22, where the uncertainties include both statistical and systematic errors. These values are in excellent agreement with the best-fitting standard Λ cold dark matter model to the latest cosmic microwave background data from Planck.