物理組  演講公告

 
 Speaker

Mr. Min-Hsiu Hsieh

Communication Sciences Institute, University of
Southern California, LA, USA

 Title Correcting quantum error with entanglement
 Time 12:30, Friday, June 22, 2007
 Place R833, New Physics Building, NTU
Abstract      We show how entanglement shared between encoder and decoder can simplify the theory of quantum error correction. The entanglement-assisted quantum codes we describe do not require the dual-containing constraint necessary for standard quantum error correcting codes, thus allowing us to "quantize" all of classical linear coding theory. In particular, efficient modern classical codes that attain the Shannon capacity can be made into entanglement-assisted quantum codes attaining the hashing bound (closely related to the quantum capacity). For systems without large amounts of  shared entanglement, these codes can also be used as catalytic codes, in which a small amount of initial entanglement enables quantum communication.