Zobrazeno 1 - 10
of 176
pro vyhledávání: '"M. V. Berry"'
Autor:
M V Berry, Pragya Shukla
Publikováno v:
New Journal of Physics, Vol 23, Iss 11, p 113014 (2021)
The concept of superoscillations is extended beyond bandlimited functions, to include monochromatic waves in space-varying media, such as wavefunctions representing quantum particles in non-constant potentials. ‘Semiclassical superoscillations’ a
Externí odkaz:
https://doaj.org/article/31d4f1d2b0794af5a54b8ce1759ff358
Autor:
M V Berry
Publikováno v:
New Journal of Physics, Vol 21, Iss 7, p 073021 (2019)
This develops a recent analysis of gentle undular tidal bores (2018 New J. Phys. 20 053066) and corrects an error. The simplest linear-wave superposition, of monochromatic waves propagating according to the shallow-water dispersion relation, leads to
Externí odkaz:
https://doaj.org/article/ddd97b173f14406db8109c9176c88ff1
Autor:
M V Berry
Publikováno v:
New Journal of Physics, Vol 20, Iss 5, p 053066 (2018)
Waves travelling up-river, driven by high tides, often consist of a smooth front followed by a series of undulations. A simple approximate theory gives the rigidly travelling profile of such ‘undular hydraulic jumps’, up to scaling, as the integr
Externí odkaz:
https://doaj.org/article/211c4a4854f84cc18afca68a2d79a523
Autor:
M V Berry, Pragya Shukla
Publikováno v:
New Journal of Physics, Vol 18, Iss 6, p 063018 (2016)
This is a theoretical study of Newtonian trajectories governed by curl forces, i.e. position-dependent but not derivable from a potential, investigating in particular the possible existence of conserved quantities. Although nonconservative and nonham
Externí odkaz:
https://doaj.org/article/a87297c43d644dd186884a70db3b2535
Autor:
M V Berry
Publikováno v:
Journal of Optics. 23:125402
The anatomy of the distorted and topologically disrupted images of an extended object after reflection by curved mirrors, and of their refraction analogues, e.g. in gravitational lensing, is determined by the caustic surfaces enveloping the ray famil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb050a005fbade8e9f5d5c7b6f046173
https://doi.org/10.1088/2040-8986/ac2f72
https://doi.org/10.1088/2040-8986/ac2f72
Autor:
M. V. Berry
Publikováno v:
European Journal of Physics. 42:065301
Mirrors that are convex in some places and concave in others can generate images of extended objects (such as the viewer’s face) that are curiously distorted and often topologically disrupted. Understanding these images involves the caustics of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c464b65c91fc591bcc2dae7ee9a85b1
https://doi.org/10.1088/1361-6404/ac1abe
https://doi.org/10.1088/1361-6404/ac1abe
Autor:
M V Berry
Publikováno v:
Nonlinearity. 30:R25-R31
If a nonlinear function F(S) depends on a function S(x) that is represented by a factorially divergent asymptotic power series in a small parameter x, each late coefficient of the power series for F(S(x)) can be represented explicitly as an asymptoti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d86c941839eebde123d5a9906f4b31d
https://doi.org/10.1088/1361-6544/aa6c78
https://doi.org/10.1088/1361-6544/aa6c78
Autor:
M V Berry
Publikováno v:
New Journal of Physics, Vol 17, Iss 6, p 060201 (2015)
A witch ball is a reflecting sphere of glass. Looking into the disk that it subtends, the whole sky can be seen at one glance. This feature can be exploited to see and photograph the squint Moon illusion, in which the direction normal to the illumina
Externí odkaz:
https://doaj.org/article/59133cc5611842a1bbf7b5c66c0dea2b
Autor:
M V Berry, Pragya Shukla
Publikováno v:
New Journal of Physics, Vol 15, Iss 1, p 013026 (2013)
The eigenangles of random matrices in the three standard circular ensembles are rendered as sounds in several different ways. The different fluctuation properties of these ensembles can be heard, and distinguished from the two extreme cases, of angle
Externí odkaz:
https://doaj.org/article/23dd6e4d164f419895dd715d3e8835fa