DEPARTMENT OF MATHEMATICS AND COMPUTER SCIENCE               
                              ODENSE UNIVERSITY                              

                            Quantum Teleportation                            

                               Gilles Brassard                               
          Departement d'informatique et de recherche operationnelle          
                            Universite de Montreal                           

                    Thursday, August 28, 1997, at 9:15 AM                    
                               The Seminar Room                              


Quantum information is  very different  from its  classical counterpart.  In
particular,  it  cannot  be  measured  reliably,  it  cannot  be  cloned  or
broadcast, and any attempts  at measuring it  spoils it irreversibly.  These
are  the  properties  that  make  quantum  cryptography  possible,  allowing
perfectly secure  transmission of  confidential  information.  On the  other
hand, those same  properties make  the transmission  of quantum  information
rather delicate, and  seemingly impossible  if only  a classical  channel is
available.  Nevertheless, quantum teleportation  is a technique  that allows
transmission of quantum  information through  a classical  channel, provided
sender and receiver  had previous access  to a quantum  channel; arbitrarily
faithful transmission  is possible  even  if the  prior  quantum channel  is
noisy.  We call this process "teleportation" because  the information has to
disappear from the sender's location before it can appear at the receiver's.
The first successful  teleportation was experimentally  realized in  a Roman
laboratory in July 1997.

This talk will not assume prior knowledge in quantum mechanics.


                                                                  Joan Boyar