Austin Hulse '19 will speak about "Quantum Reference Frames."
Abstract: Suppose Alice and Bob lack a common coordinate system. To align their personal reference frames, they must share a physical, quantum system in an asymmetric state. However, for spatial rotations a finite quantum reference frame cannot achieve perfect alignment. The study of quantum reference frames is profoundly linked to the quantum theory of symmetry, and symmetry in turn is linked to conservation laws. Thinking about quantum reference frames leads to the Wigner-Araki-Yanase superselection theorem in which conservation laws limit the possible states and measurements that can be realized in quantum mechanics. This year we will explore these ideas and generalize them to modal quantum theory, a mathematical cousin of quantum mechanics that replaces complex numbers with finite fields and has no notion of probability.
All talks begin promptly at 12:10 p.m. Lunch will be served from 11:50 a.m. to 12:10 p.m.
This talk is part of the Physics Colloquium Series.
Friday, September 14, 2018 at 12:10pm to 1:00pm
Hayes Hall, 211/213
201 North College Road, Gambier, OH 43022