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Physics Colloquium: "Optical studies of current-induced magnetization switching and photonic quantum states"

Event Type
Seminar/Symposium
Sponsor
Department of Physics
Location
141 Loomis
Date
Mar 29, 2017   4:00 pm  
Speaker
Virginia Lorenz, University of Illinois at Urbana-Champaign
Contact
Stephanie Johansson
E-Mail
sjohanss@illinois.edu
Phone
217-300-4241
Views
11
Originating Calendar
Physics - Colloquium

The ever-decreasing size of electronic components is leading to a fundamental change in the way computers operate, as at the few-nanometer scale, resistive heating and quantum mechanics prohibit efficient and stable operation. One of the most promising next-generation computing paradigms is Spintronics, which uses the spin of the electron to manipulate and store information in the form of magnetic thin films. I will present our optical studies of the fundamental mechanisms by which we can efficiently manipulate magnetization using electrical current. Although electron spin is a quantum-mechanical property, Spintronics relies on macroscopic magnetization and thus does not take advantage of quantum mechanics in the algorithms used to encode and transmit information. For the second part of my talk, I will present our work under the umbrella of new computing and communication technologies based on the quantum mechanical properties of photons. Quantum technologies often require the carriers of information, or qubits, to have specific properties. Photonic quantum states are good information carriers because they travel fast and are robust to environmental fluctuations, but characterizing and controlling photonic sources so the photons have just the right properties is still a challenge. I will describe our work towards enabling quantum-physics-based secure long-distance communication using photons.

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