Entropy. Energy.
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, [1] there began a vigorous campaign of generation, detection and application of vortex states of light, [2] which has since been extended to electrons, neutrons, atoms and molecules. [3] I shall give an accessible overview of this field and present recent results on generation of neutron helical waves.[4]
- 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.
https://jqi.umd.edu/people/charles-clark
https://www.nist.gov/people/charles-w-clark
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