Bulletin of the American Physical Society
2018 Annual Meeting of the APS Four Corners Section
Volume 63, Number 16
Friday–Saturday, October 12–13, 2018; University of Utah, Salt Lake City, Utah
Session B01: Plenary I |
Hide Abstracts |
Chair: Jean-Francois Van Huele, Brigham Young University Room: Aline Wilmot Skaggs Biology Building 220 |
Friday, October 12, 2018 8:45AM - 9:21AM |
B01.00001: Atomtronic Transistors & Circuits Invited Speaker: Dana Z Anderson As an analog of electronics, atomtronics provides a framework for making use of ultracold atoms in practical applications involving sensing and quantum information processing tasks. For the same reason that the semiconductor transistor is so ubiquitous and important in electronics, so is the atomtronic matterwave transistor pivotal to atomtronic circuitry. Atomtronic circuits are fundamentally many-bodied quantum systems operating in an open-systems regime. That is to say, even the simplest atomtronic circuits present challenges to a full understanding of their behavior. This work begins with a review of our experimental work on a triple-well atomtronic transistor and then provides insight into the underlying principles of transistor action leading, in particular, to matterwave gain and how that gain might be used in some simple but meaningful applications such as a gyroscope for inertial navigation. |
Friday, October 12, 2018 9:21AM - 9:57AM |
B01.00002: Molecular Recognition of Ice by Proteins: from Ice Nucleation to Antifreeze Invited Speaker: Valeria Molinero Bacteria, insects and fish that thrive at subfreezing temperatures produce proteins that bind to ice and manage its formation and growth. Ice binding proteins include antifreeze proteins and ice-nucleating proteins. The latter are the most efficient ice nucleators found in Nature. Many questions remain on how do these proteins recognize or nucleate ice, what drives their selectivity and binding to ice, and how does the size and aggregation of the proteins modulate their function. In this presentation, I will discuss our recent work addressing these questions using molecular simulations and theory, with particular focus on how the proteins control the formation of ice and resolving the apparent paradox that the same structures can promote and prevent ice formation. |
Friday, October 12, 2018 9:57AM - 10:33AM |
B01.00003: Kinetic theory of neutrinos and nuclei in the 'early' universe Invited Speaker: Mark W Paris We wish to use astronomical observations of the early universe at high precision as an extraterrestrial laboratory to study an array of fundamental and applied questions in nuclear and particle physics. Suppose, for example, we want to constrain a particular beyond-standard model scenario that might affect the amounts of light elements created in the Big Bang. Here, as in other scenarios we might consider, we are faced with solving two challenging, tightly coupled problems. That of the non-equilibrium evolution of the neutrino distributions in energy and flavor and, second, determining the nuclear abundances, which depend sensitively on weak interactions with neutrinos, by solving a stiff nuclear reaction network. We overview work on this topic, highlighting recent advances in our understanding of neutrino flavor evolution in the presence of their collisions with each other and matter in the early universe. We demonstrate, by concurrent solution of the neutrino and matter plasma evolution, percent-level effects on predicted deuterium abundances due to non-equilibrium distortions of the neutrino spectra, an order of magnitude larger than previous estimates. Preliminary results for coherent neutrino flavor evolution in the presence of collisions are also discussed. |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700