Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session Y47: Nonequilibrium Thermodynamics
11:15 AM–1:51 PM,
Friday, March 9, 2018
LACC
Room: 507
Sponsoring
Unit:
GSNP
Chair: Stephen Teitsworth, Duke Univ
Abstract ID: BAPS.2018.MAR.Y47.11
Abstract: Y47.00011 : Population Inversion without Pumping: Supradegeneracy
1:15 PM–1:27 PM
View Presentation
Abstract
Presenter:
Daniel Sheehan
(Department of Physics and Biophysics, University of San Diego)
Author:
Daniel Sheehan
(Department of Physics and Biophysics, University of San Diego)
Population inversion, the primary thermodynamic phenomenon behind most lasers and masers, is thought to require nonequilibrium pumping; for lasers this typically involves optical or electronic excitation, electric discharge, or chemical reactions. In this talk it is shown from first principles that population inversion does not require pumping, but instead can arise spontaneously at equilibrium when the degeneracy of a system increases quickly enough to dominate its
Boltzmann exponential. Examples of this supradegeneracy have not yet been identified in Nature, however they appear possible to create by design. Potential structures and applications of solid state supradegenerate systems will be discussed.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.Y47.11
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