Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Bertrand, Delamotte"'
Publikováno v:
Physical Review D. 102
We study the $O(N)$ model in dimension three ($3d$) at large and infinite $N$ and show that the line of fixed points found at $N=\ensuremath{\infty}$---the Bardeen-Moshe-Bander (BMB) line---has an intriguing origin at finite $N$. The large $N$ limit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85be569c0358dcc4e84fbd776bfdeab9
https://doi.org/10.1103/physrevd.102.065008
https://doi.org/10.1103/physrevd.102.065008
Publikováno v:
Phys.Rev.Lett.
Phys.Rev.Lett., 2019, 123 (24), pp.240604. ⟨10.1103/PhysRevLett.123.240604⟩
Phys.Rev.Lett., 2019, 123 (24), pp.240604. ⟨10.1103/PhysRevLett.123.240604⟩
We provide analytical arguments showing that the non-perturbative approximation scheme to Wilson's renormalisation group known as the derivative expansion has a finite radius of convergence. We also provide guidelines for choosing the regulator funct
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8555ca9fea81bf74c0c52b35259714db
https://hal.archives-ouvertes.fr/hal-02188862
https://hal.archives-ouvertes.fr/hal-02188862
Autor:
Bertrand Delamotte, Shunsuke Yabunaka
Publikováno v:
Physical Review Letters. 121
The large $N$ expansion plays a fundamental role in quantum and statistical field theory. We show on the example of the $\mathrm{O}(N)$ model that at $N=\ensuremath{\infty}$ its standard implementation misses some fixed points of the renormalization
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https://explore.openaire.eu/search/publication?articleId=doi_________::ef67c850c8d7a1075e7e1ad91ba0d969
https://doi.org/10.1103/physrevlett.121.231601
https://doi.org/10.1103/physrevlett.121.231601
Publikováno v:
Physical review letters. 121(23)
The large N expansion plays a fundamental role in quantum and statistical field theory. We show on the example of the O(N) model that at N=∞ its standard implementation misses some fixed points of the renormalization group in all dimensions smaller
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https://explore.openaire.eu/search/publication?articleId=pmid________::86b1e56126e1415caef98e8c1e768fc5
https://pubmed.ncbi.nlm.nih.gov/30576204
https://pubmed.ncbi.nlm.nih.gov/30576204
Autor:
Bertrand Delamotte, Shunsuke Yabunaka
Publikováno v:
Physical Review Letters. 119
We find that the multicritical fixed point structure of the O(N) models is much more complicated than widely believed. In particular, we find new nonperturbative fixed points in three dimensions (d=3) as well as at N=∞. These fixed points come toge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de2271f57511db238321dee4851451bb
https://doi.org/10.1103/physrevlett.119.191602
https://doi.org/10.1103/physrevlett.119.191602
Publikováno v:
Physical review letters. 119(19)
We find that the multicritical fixed point structure of the O(N) models is much more complicated than widely believed. In particular, we find new nonperturbative fixed points in three dimensions (d=3) as well as at N=∞. These fixed points come toge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::4df976c8613a15d4e4669825453106ad
https://pubmed.ncbi.nlm.nih.gov/29219526
https://pubmed.ncbi.nlm.nih.gov/29219526
Autor:
Bertrand Delamotte, Charlie Duclut
The anisotropic model for landscapes erosion proposed by Pastor-Satorras and Rothman in [R. Pastor-Satorras and D. H. Rothman, Phys. Rev. Lett. 80, 4349 (1998)] is believed to capture the physics of erosion at intermediate length scale ($\lesssim3$ k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94569082c7ff68d541eee7a60727eb05
http://arxiv.org/abs/1705.05294
http://arxiv.org/abs/1705.05294
Autor:
Bertrand Delamotte, Charlie Duclut
Publikováno v:
Physical Review E
Physical Review E, American Physical Society (APS), 2017, 95, pp.012107. ⟨10.1103/PhysRevE.95.012107⟩
Physical Review E, 2017, 95, pp.012107. ⟨10.1103/PhysRevE.95.012107⟩
Physical Review E, American Physical Society (APS), 2017, 95, pp.012107. ⟨10.1103/PhysRevE.95.012107⟩
Physical Review E, 2017, 95, pp.012107. ⟨10.1103/PhysRevE.95.012107⟩
We derive the necessary conditions for implementing a regulator that depends on both momentum and frequency in the nonperturbative renormalization group flow equations of out-of-equilibrium statistical systems. We consider model A as a benchmark and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dee88b92ef563306474b462d2427bff6
https://pubmed.ncbi.nlm.nih.gov/28208463
https://pubmed.ncbi.nlm.nih.gov/28208463
Publikováno v:
Physical Review D. 93
A numerical implementation of the nonperturbative renormalization group is used to compute the two-particle bound state mass of ${\ensuremath{\phi}}^{4}$ quantum field theory in three dimensions to good accuracy, in agreement with the results from ot
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https://explore.openaire.eu/search/publication?articleId=doi_________::56f2acbd15058363bf1a3740f23962d7
https://doi.org/10.1103/physrevd.93.125018
https://doi.org/10.1103/physrevd.93.125018
Autor:
Hugues Chaté, Federico Benitez, I. Dornic, Bertrand Delamotte, Miguel A. Muñoz, Charlie Duclut
Publikováno v:
Physical Review Letters
Physical Review Letters, American Physical Society, 2016, 117, pp.100601. ⟨10.1103/PhysRevLett.117.100601⟩
Physical Review Letters, 2016, 117, pp.100601. ⟨10.1103/PhysRevLett.117.100601⟩
Physical Review Letters, American Physical Society, 2016, 117, pp.100601. ⟨10.1103/PhysRevLett.117.100601⟩
Physical Review Letters, 2016, 117, pp.100601. ⟨10.1103/PhysRevLett.117.100601⟩
For reaction-diffusion processes with at most bimolecular reactants, we derive well-behaved, numerically tractable, exact Langevin equations that govern a stochastic variable related to the response field in field theory. Using duality relations, we
Externí odkaz:
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https://pubmed.ncbi.nlm.nih.gov/27636462
https://pubmed.ncbi.nlm.nih.gov/27636462