Thursday, May 27, 201012:30 PM - 2:00 PMNOTE: T-DO Conf. Rm. TA-03, Bldg 123, Room 121|
Robin Blume-KohoutPerimeter Institute for Theoretical Physics, Waterloo, Ontario, Canada
It's been suggested that "decoherence explains the
emergence of a classical world". That is, if we believe our world is
quantum, then decoherence can explain why it LOOKS classical.
Logically, this implies that without decoherence, the world would not
look classical. But... what on earth WOULD it look like? Human
beings seem incapable of directly observing anything "nonclassical".
I'll show you how a hypothetical quantum critter could interact with,
and learn about, its world. A quantum agent can use coherent
measurements to gain quantum knowledge about its surroundings. They
can use that quantum knowledge to accomplish tasks. Moreover, clumsy
classical critters (like me!) could identify quantum agents (and prove
that they are using quantum knowledge), because they outperform all
classical agents. I'll explain the remarkable new perspective on
quantum states that comes from thinking about quantum knowledge, and
I'll argue that it's a useful perspective by showing you two concrete
applications derived from it.
Host: Michael Zwolak