Lab Home | Phone | Search
Center for Nonlinear Studies  Center for Nonlinear Studies
 Home 
 People 
 Current 
 Affiliates 
 Alumni 
 Visitors 
 Students 
 Research 
 ICAM-LANL 
 Quantum 
 Publications 
 Publications 
 2007 
 2006 
 2005 
 2004 
 2003 
 2002 
 2001 
 2000 
 <1999 
 Conferences 
 Workshops 
 Sponsorship 
 Talks 
 Colloquia 
 Colloquia Archive 
 Seminars 
 Postdoc Seminars Archive 
 Quantum Lunch 
 CMS Colloquia 
 Q-Mat Seminars 
 Q-Mat Seminars Archive 
 Archive 
 Kac Lectures 
 Dist. Quant. Lecture 
 Ulam Scholar 
 Colloquia 
 
 Jobs 
 Students 
 Summer Research 
 Student Application 
 Visitors 
 Description 
 Past Visitors 
 Services 
 General 
 PD Travel Request 
 
 History of CNLS 
 
 Maps, Directions 
 CNLS Office 
 T-Division 
 LANL 
 
Thursday, November 03, 2011
2:00 PM - 3:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

Postdoc Seminar

Quantum communication with zero capacity gaussian channels

Jon Yard
CCS-3: INFORMATION SCIENCES

As with classical information, error-correcting codes enable reliable transmission of quantum information through noisy or lossy channels. The capacity of a communication channel is the ultimate bound on error-correction, quantifying the amount of information that could in principle be protected by any code whatsoever. Contrasting the classical theory, I showed with Smith (Science, 2008) that imperfect quantum channels can exhibit a strong kind of synergy: pairs of quantum channels exist, each of zero quantum capacity, which acquire positive quantum capacity when used together. In this talk, I will present recent work with Smith and Smolin (Nature Photonics, 2011), showing that this ‘superactivation’ phenomenon also occurs in the more realistic setting of optical channels with attenuation and Gaussian noise. This paves the way for its experimental realization and application in real-world communications systems.

Host: Kipton Barros, T-4 and CNLS