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pro vyhledávání: '"Speirits, Fiona"'
In this work the random forest algorithm GALPRO is implemented to generate photometric redshift posteriors, and its performance when trained and then applied to data from another survey is investigated. The algorithm is initially calibrated using a t
Externí odkaz:
http://arxiv.org/abs/2407.20670
We detail a quantum circuit capable of efficiently encoding analytical approximations to gravitational wave signal waveforms of compact binary coalescences into the amplitudes of quantum bits using both quantum arithmetic operations and hybrid classi
Externí odkaz:
http://arxiv.org/abs/2306.11073
We show that Skyrmion field lines, constructed from the local Stokes parameters, trace out lines of constant optical polarisation.
Comment: Updated version published in Europhysics Letters. Only minor changes
Comment: Updated version published in Europhysics Letters. Only minor changes
Externí odkaz:
http://arxiv.org/abs/2304.09668
Stated simply the paradox is as follows: it is clear that the orbital angular momentum of a light beam in its direction of propagation is an intrinsic quantity, and therefore has the same value everywhere in the beam. How then can a Gaussian beam, wi
Externí odkaz:
http://arxiv.org/abs/2203.03742
Autor:
Gao, Sijia, Götte, Jörg B., Speirits, Fiona C., Castellucci, Francesco, Franke-Arnold, Sonja, Barnett, Stephen M.
Publikováno v:
Phys. Rev. A 102, 053513 (2020)
Vector vortex beams possess a topological property that derives both from the spatially varying amplitude of the field and also from its varying polarization. This property arises as a consequence of the inherent Skyrmionic nature of such beams and i
Externí odkaz:
http://arxiv.org/abs/1906.05333
Akademický článek
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Autor:
Götte Jörg, Ye Zhujun, McWilliams Amy, Cisowski Claire, Speirits Fiona, Franke-Arnold Sonja, Barnett Stephen M.
Publikováno v:
EPJ Web of Conferences, Vol 309, p 11003 (2024)
Vector light beams feature a spatially varying optical polarisation and can exhibit localised structures reminiscent of the skyrmions familiar from the study of magnetic media. We present a theory and experimental measurements of such skyrmions in bo
Externí odkaz:
https://doaj.org/article/78e7c71dd8d54eb487d3bb4d5e32005d
The subtraction or addition of a prescribed number of photons to a field mode does not, in general, simply shift the probability distribution by the number of subtracted or added photons. Subtraction of a photon from an initial coherent state, for ex
Externí odkaz:
http://arxiv.org/abs/1806.09475
Autor:
Speirits, Fiona Claire
In a discipline commonly faulted for ad hoc assumptions and models with very little discriminating observational evidence, cosmologists are continually trying, and in many cases succeeding, to improve both the data and models. However, the desire to
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.495148
Autor:
Giovannini, Daniel, Romero, Jacquiline, Potocek, Vaclav, Ferenczi, Gergely, Speirits, Fiona, Barnett, Stephen M., Faccio, Daniele, Padgett, Miles J.
Publikováno v:
Science 347(6224), 857 (2015)
That the speed of light in free space is constant is a cornerstone of modern physics. However, light beams have finite transverse size, which leads to a modification of their wavevectors resulting in a change to their phase and group velocities. We s
Externí odkaz:
http://arxiv.org/abs/1411.3987