Gerhard Fasol, Chair and Producer.
Monday 20 Feb 2023 (179th anniversary of Ludwig Boltzmann’s birthday)
Charles W Clark:
Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland
Abtract: The vortex theory of the atom had some currency in the 19th century, due to conservation properties of vorticity in fluids that hinted a mechanism that could explain the stability of atoms. That theory did not survive encounters with experiment, but about a century after J. J. Thomson’s Adams Prize essay,  there began a vigorous campaign of generation, detection and application of vortex states of light,  which has since been extended to electrons, neutrons, atoms and molecules.  I shall give an accessible overview of this field and present recent results on generation of neutron helical waves.
- J. J. Thomson, “A Treatise on the Motion of Vortex Rings: An essay to which the Adams Prize was adjudged in 1882, in the University of Cambridge.” (Macmillan and Co., London, 1883)
- V. Yu. Bazhenov, M. V. Vasnetsov, and M. S. Soskin, “Laser beams with screw dislocations in their wavefronts,” Pis’ma Zh. Eksp. Teor. Fiz. 52, 1037-1039 (1990)
- See e.g. K. Bliokh, et al., “Roadmap on structured waves,” arXiv:2301.05349 (13 January 2023) https://arxiv.org/abs/2301.05349
- D. Sarenac, et al., “Experimental realization of neutron helical waves,” Sci. Adv. 8, eadd2002 (2022) https://www.science.org/doi/10.1126/sciadv.add2002
Charles W Clark
Charles W. Clark is a Fellow of the Joint Quantum Institute of the National Institute of Standards and Technology and the University of Maryland, now resident as Visiting Scholar at Merton College, University of Oxford.
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