Events at Physics
Events on Tuesday, March 24th, 2015
- Chaos & Complex Systems Seminar
- What is the Internet of Things (IOT) and key trends?
- Time: 12:05 pm
- Place: 4274 Chamberlin Hall (Refreshments will be served)
- Speaker: Sandra Bradley, UW Department of Industrial Engineering
- Abstract: The landscape of technology is changing at an ever-increasingly rapid pace. Broadband connectivity is inexpensive and ubiquitous; devices are becoming more powerful and smaller with a variety of on-board sensors. The data in this machine-to-machine world creates "smart" experiences for everyday consumers and businesses alike. This highly-charged connected world is what we are calling the Internet of Things. As Boo-Keun Yoon, president and CEO of Samsung Electronics Samsung said at a conference recently, "IoT isn't science fiction anymore. It's science fact." We are already seeing applications ranging from energy efficiency to logistics to personal healthcare to smart homes using IoT concepts. In this session we will give an overview of what IoT is, how it will change the way we live and work, and will talk about key trends and challenges in IoT.
- Host: Clint Sprott
- Theory Seminar (High Energy/Cosmology)
- Dynamical Pion Collapse and Neutrino Beam Coherence
- Time: 4:00 pm
- Place: 5280 Chamberlin Hall
- Speaker: Benjamin Jones, MIT
- Abstract: Neutrino oscillations are the first and only observed phenomena beyond the standard model, and measuring the parameters which govern them is a major area of current research. The textbook theoretical treatment of neutrino oscillations, however, is known to be both approximate and inconsistent. The range of its validity is debated, with some estimates suggesting that neutrino coherence loss could occur in existing experiments, especially if heavier, sterile neutrinos participate in the oscillation. All calculations of these effects to date require an assumption about the initial neutrino state, usually obtained by dimensional analysis, and spanning several orders of magnitude between treatments. In this talk I will show that derivation of neutrino coherence properties without an arbitrary initial-state assumption is possible if the neutrino beam is properly treated as an open quantum system. I will present the first such calculation, where the full oscillation phenomenology of neutrinos produced in accelerator neutrino beams is derived without arbitrary spatial scales at the neutrino production vertex. The resulting range of validity of the typical neutrino oscillation formalism will then be discussed.
- Host: Ran Lu