Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Nigel Cundy"'
Publikováno v:
Nuclear Physics B, Vol 895, Iss , Pp 64-131 (2015)
We investigate the relationship between colour confinement and the gauge independent Cho–Duan–Ge Abelian decomposition. The decomposition is defined in terms of a colour field n; the principle novelty of our study is that we have used a unique de
Externí odkaz:
https://doaj.org/article/faff9971c56c4bd69dd4674320b5987f
Publikováno v:
Proceedings of The 33rd International Symposium on Lattice Field Theory — PoS(LATTICE 2015).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70a0d9172a6f25e3bbf8603592b5679c
https://doi.org/10.22323/1.251.0066
https://doi.org/10.22323/1.251.0066
Publikováno v:
Computer physics communications 180, 201-208 (2009). doi:10.1016/j.cpc.2008.09.010
Tunneling between different topological sectors with dynamical chiral fermions is difficult because of a poor mass scaling of the pseudo-fermion estimate of the determinant. For small fermion masses it is virtually impossible using standard methods.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6fd41c77520a332e98b26c53808a0e6
https://doi.org/10.1016/j.cpc.2008.09.010
https://doi.org/10.1016/j.cpc.2008.09.010
Publikováno v:
Computer Physics Communications. 180:26-54
The extreme computational costs of calculating the sign of the Wilson matrix within the overlap operator have so far prevented four dimensional dynamical overlap simulations on realistic lattice sizes, because the computational power required to inve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5909fe3474883d7ef7b0e5f5e1ec29d0
https://doi.org/10.1016/j.cpc.2008.08.006
https://doi.org/10.1016/j.cpc.2008.08.006
Autor:
Nigel Cundy, Weonjong Lee
We report on our efforts to implement overlap fermions on NVIDIA GPUs using CUDA, commenting on the algorithms used, implemetation details, and the performance of our code.
7 Pages, 2 figures, Lattice 2015(Algorithms and Machines); v2 minor upda
7 Pages, 2 figures, Lattice 2015(Algorithms and Machines); v2 minor upda
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67fe6655f11195a07679adcdcf27c032
http://arxiv.org/abs/1510.06897
http://arxiv.org/abs/1510.06897
Autor:
Nigel Cundy, Weonjong Lee
We discuss the usage and applicability of deflation methods for the overlap lattice Dirac operator, focusing on calculating the eigenvalues using a method similar to the eigCG algorithm used for other Dirac operators. The overlap operator, which cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6132e6a86ebe04da109814aaa8739e6e
http://arxiv.org/abs/1501.01855
http://arxiv.org/abs/1501.01855
In the past few years, we have presented a new way of considering quark confinement. Through a careful choice of a Cho-Duan-Ge Abelian Decomposition, we can construct the QCD Wilson Loop in terms of an Abelian restricted field. The relationship betwe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c2a9b74a160e0c55eaa8ef9a70d5af4
http://arxiv.org/abs/1411.0755
http://arxiv.org/abs/1411.0755
Publikováno v:
Physics Letters B
We investigate the relationship between colour confinement and topological structures derived from the gauge invariant Abelian (Cho-Duan-Ge) decomposition. This Abelian decomposition is made imposing an isometry on a colour field $n$ which selects th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1ff443c9f4b4582242f73d40a56468b
http://www.openaccessrepository.it/record/6333/files/main.pdf
http://www.openaccessrepository.it/record/6333/files/main.pdf
Publikováno v:
Computer Physics Communications. 179:181-183
We present preliminary results of a test of our dynamical overlap simulations, where we calculate the unrenormalized chiral condensate from a direct calculation, the overlap eigenvalue distribution and the topological susceptibility. We observe a (as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccde29b2b30405cd2525a1ada96d00b7
https://doi.org/10.1016/j.cpc.2008.01.025
https://doi.org/10.1016/j.cpc.2008.01.025
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 140:856-858
We present relaxation and preconditioning techniques which accelerate the inversion of the overlap operator by a factor of four on small lattices, with larger gains as the lattice size increases. These improvements can be used in both propagator calc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6cf6a3139dbc5b39e89c4a213f00c5f4
https://doi.org/10.1016/j.nuclphysbps.2004.11.149
https://doi.org/10.1016/j.nuclphysbps.2004.11.149