Lab Home | Phone | Search
Center for Nonlinear Studies  Center for Nonlinear Studies
 Home 
 People 
 Current 
 Affiliates 
 Visitors 
 Students 
 Research 
 ICAM-LANL 
 Publications 
 Conferences 
 Workshops 
 Sponsorship 
 Talks 
 Colloquia 
 Colloquia Archive 
 Seminars 
 Postdoc Seminars Archive 
 Quantum Lunch 
 Quantum Lunch Archive 
 CMS Colloquia 
 Q-Mat Seminars 
 Q-Mat Seminars Archive 
 Archive 
 Kac Lectures 
 Dist. Quant. Lecture 
 Ulam Scholar 
 Colloquia 
 
 Jobs 
 Postdocs 
 CNLS Fellowship Application 
 Students 
 Summer Research 
 Visitors 
 Description 
 Past Visitors 
 Services 
 General 
 
 History of CNLS 
 
 Maps, Directions 
 CNLS Office 
 T-Division 
 LANL 
 
Thursday, December 13, 2012
12:30 PM - 2:00 PM
T-DO Conference Room Bldg 123, Room 121

Quantum Lunch

Universality of redundancy under pure decoherence

Michael Zwolak
Department of Physics Oregon State University

Quantum Darwinism has arisen as a framework to understand how the classical, objective world emerges from this fundamentally unpredictable quantum substrate. Here we show that a sufficient condition for the proliferation of objective information into the world is that a system undergoes pure decoherence. The crux of our demonstration is to show explicitly that many observers can independently extract information about the certain states of the system the so-called pointer states. The information is thus redundant, and, for a system in two possible configurations, the redundancy is quantified by the Quantum Chernoff Information. The information is also robust it is accessible even in very noisy environments and to the least savvy observers. These results clarify the role of amplification in the quantum-to-classical transition, as well as elucidate the environment's ability to act as a communication channel and create objective states of quantum systems.

Host: Adolfo del Campo, T-4 and CNLS