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DTSTART:20180325T030000
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DTSTAMP:20260424T125155Z
UID:1520956800@ist.ac.at
DTSTART:20180313T170000
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DESCRIPTION:Speaker: Anton Zeilinger\nhosted by Tom Henzinger\nAbstract: Af
 ter more than two decades of development\, quantum communication has now r
 eached a rather advanced level. The development clearly points towards a f
 uture quantum internet. After reviewing some of the early experiments\, pa
 rticularly on quantum cryptography and on long-distance quantum teleportat
 ion\, I will give a brief overview of the current state with focus on quan
 tum communication with individual photons. Parallel to the communication e
 xperiments themselves there have been an increasing number of tests of qua
 ntum entanglement as signified by the Einstein-Podolsky-Rosen Paradox and 
 Bell's Inequality. Such experiments\, besides closing any possible loophol
 es for a local realist\, i.e. classical\, view of the world\, also provide
  confirmation that unconditionally secure quantum cryptography is possible
 . The most recent experiments include long-distance quantum teleportation\
 , including long-distance entanglement swapping\, which is the teleportati
 on of an entangled state. Such experiments are considered to be a basic in
 gredient of future quantum repeaters between quantum computers. Further\, 
 for most quantum communication experiments\, a qubit\, i.e. a two-state qu
 antum system\, is the basic carrier of information. In recent experiments\
 , it has been shown that this limit can be broken by high-dimensional stat
 es\, particularly multi-mode states\, and by photon states which carry orb
 ital angular momentum. Such techniques have also been tested over long dis
 tances in free space despite expectations that atmospheric fluctuations mi
 ght make the communication impossible. Most recently\, the Chinese quantum
  satellite Micius has established various quantum techniques for communica
 tion from ground to satellite or between ground stations. Of those\, I wil
 l focus particularly on intercontinental quantum key distribution\, as rec
 ently established. The long-term vision is a world-wide network combining 
 quantum satellites and large-scale ground state fiber networks.Free shuttl
 e buses are provided to / from campus:Regular IST Austria shuttle #142: 4:
 17 pm from U4 Heiligenstadt/public bus stop (return from IST Austria Campu
 s at 6:54 pm)Special IST Lecture shuttle 1: 4 pm from Schwedenplatz Night 
 Bus stop (return from IST Austria campus at 7:15 pm) – register online!>
 Please register here by March 5. (http://ist.ac.at/IST-Lecture-Registratio
 n)>Download the invitation (https://ist.ac.at/fileadmin/user_upload/pdfs/I
 ST_Lectures/Zeilinger/IST_Lecture_Zeilinger.pdf)
LOCATION:Raiffeisen Lecture Hall\, Central Building\, ISTA
ORGANIZER:arinya.eller@ist.ac.at
SUMMARY:Anton Zeilinger: Quantum Communication
URL:https://talks-calendar.ista.ac.at/events/942
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