Document Detail

Detecting incapacity of a quantum channel.
MedLine Citation:
PMID:  23003934     Owner:  NLM     Status:  In-Data-Review    
Using unreliable or noisy components for reliable communication requires error correction. But which noise processes can support information transmission, and which are too destructive? For classical systems any channel whose output depends on its input has the capacity for communication, but the situation is substantially more complicated in the quantum setting. We find a generic test for incapacity based on any suitable forbidden transformation-a protocol for communication with a channel passing our test would also allow one to implement the associated forbidden transformation. Our approach includes both known quantum incapacity tests-positive partial transposition and antidegradability (no cloning)-as special cases, putting them both on the same footing.
Graeme Smith; John A Smolin
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Publication Detail:
Type:  Journal Article     Date:  2012-06-08
Journal Detail:
Title:  Physical review letters     Volume:  108     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-09-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  230507     Citation Subset:  IM    
IBM T. J. Watson Research Center, Yorktown Heights, New York 10598, USA.
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