Physics @ Berkeley
Events in Physics
Title: Quantum Information Can Be Negative    (Colloquia)
Start Date: 09/12/2011
Time: 4:30 pm
Location: 1 Le Conte Hall
Speaker: Jonathan Oppenheim
Affiliation: DAMTP, University of Cambridge
Contact Person: Sarah Wittmer   (510) 642-3034

Quantum information is radically different to classical information. For example, it can be negative -- in a sense, after you are given quantum information, you can know less.  This can be given a precise operational meaning by quantifying how much quantum communication is needed to transfer part of a quantum state.  Another example: two quantum channels, both with a transmission capacity of zero, can be combined to yield a nonzero capacity, something impossible in the classical world. Iíll also discuss applications of quantum information theory to fundamental physics.