Zobrazeno 1 - 10
of 55
pro vyhledávání: '"I A, Drummond"'
Autor:
I. T. Drummond
Publikováno v:
Physical Review
We study the effect of Lorentz symmetry violation (LSV) on the behaviour at high energy of SU(N) gauge theory with quarks in the fundamental representation. The approach is similar to that for QED treated in a previous paper. In contrast to QED, stan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41136cfdbf4a7e6b3dd6a80885008b24
https://doi.org/10.1103/physrevd.101.085004
https://doi.org/10.1103/physrevd.101.085004
Autor:
I. T. Drummond
We study, as a model of Lorentz symmetry breaking, the quantisation and renormalisation of an extension of QED in a flat spacetime where the photons and electrons propagate differently and do not share the same lightcone. We will refer to this model
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::977ff0ab0c7fba559d3bad56e7212dea
http://arxiv.org/abs/1603.09211
http://arxiv.org/abs/1603.09211
Autor:
I T Drummond
Publikováno v:
Journal of Physics: Conference Series. 952:012001
We investigate Lorentz symmetry (CPT even) breakdown without assuming that it is small. We look for constraints necessary for compatibility with causal structure in the context of scalar theories and QED.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89bc2185ffbe47dbbe351fc2e08dab08
https://doi.org/10.1088/1742-6596/952/1/012001
https://doi.org/10.1088/1742-6596/952/1/012001
Publikováno v:
Journal of Physics A: Mathematical and General. 37:10459-10477
We develop perturbation theory and physically motivated resummations of the perturbation theory for the problem of a tracer particle diffusing in a random media. The random media contains point scatterers of density $\rho$ uniformly distributed throu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b00c625cfcb0ed4ac02173a0db8d1796
https://doi.org/10.1088/0305-4470/37/44/001
https://doi.org/10.1088/0305-4470/37/44/001
Publikováno v:
Europhysics Letters (EPL). 42:241-246
We examine the dynamics of the so-called Toy Model with an added inertial term. The problem is essentially the Kramers problem for a massive particle in a flow field given by the gradient of a quenched Gaussian random potential. The correlations of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46a7a3d6de17f293067d26c4939670b4
https://doi.org/10.1209/epl/i1998-00236-0
https://doi.org/10.1209/epl/i1998-00236-0
Publikováno v:
Journal of Physics A: Mathematical and General. 30:385-396
By means of rather general arguments, based on an approach due to Derrida that makes use of samples of finite size, we analyse the effective diffusivity and drift tensors in certain types of random medium in which the motion of the particles is contr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74c3d18db0e9ff2dde33d6f23905383e
https://doi.org/10.1088/0305-4470/30/2/006
https://doi.org/10.1088/0305-4470/30/2/006
Autor:
I. T. Drummond
Publikováno v:
Physical Review D. 88
By means of simple models in a flat spacetime manifold we examine some of the issues that arise when quantizing interacting quantum fields in multi-metric backgrounds. In particular we investigate the maintenance of a causal structure in the models.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5df5b6f4bef35106cd2f5f9536956e4b
https://doi.org/10.1103/physrevd.88.025009
https://doi.org/10.1103/physrevd.88.025009
Publikováno v:
Journal of Physics A: Mathematical and General. 29:7867-7879
We investigate the relationship between the effective diffusivity and effective drift of a particle moving in a random medium. The velocity of the particle combines a white noise diffusion process with a local drift term that depends linearly on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00b5bcbe30b07f0c2a842a1b334fea1d
https://doi.org/10.1088/0305-4470/29/24/012
https://doi.org/10.1088/0305-4470/29/24/012
Autor:
R. M. D. Bryson, I. W. Drummond
Publikováno v:
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences. 354:2667-2682
X-ray photoelectron spectroscopy (XPS) is a well established surface analytical technique capable of giving elemental and chemical state information for nearly all elements. Recent improvements in the sensitivity of the method have made spatially res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97600289d574e8bf0a7ca1344dd8fe49
https://doi.org/10.1098/rsta.1996.0122
https://doi.org/10.1098/rsta.1996.0122
Publikováno v:
Journal of Physics A: Mathematical and General. 28:6013-6025
We study the effective diffusivity tensor for particles in a random gradient flow that, statistically, lacks rotational symmetry. The effective diffusivity tensor is computed up to two-loop order in perturbation theory and the 'Ward identity' that re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47e517c64c3c5cfb1ba6e7d8a4c56baf
https://doi.org/10.1088/0305-4470/28/21/009
https://doi.org/10.1088/0305-4470/28/21/009