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Manne Siegbahn Memorial Lectures:
Quantum Teleportation, Entanglement, and
Einstein’s Question “What is Light?”
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Date: |
Download-files: |
Time: |
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Thursday, 05. Nov. 2015 |
Audio-only-Recording as MP3-File
(smallest possible size):
- Audio.mp3 (ca.32 Mb) ============================================ Video-Recording for any system with MP4-support:
- Video.mp4 (ca.225 Mb) |
15:15 – 15:20 |
Speaker :
Anton Zeilinger (
Abstract :
Einstein received the 1922 Nobel Prize for his groundbreaking idea of 1905 that
light consists of particles,
today called
photons. Together with Podolsky and Rosen, he
proposed in 1935 that two quantum systems can be
connected
in a way that is much stronger than in classical physics. The Austrian Nobel
Prize winner Erwin Schrödinger coined the name “entanglement” and called it
“the essential feature of quantum mechanics”. By Einstein, it was dismissed
as
“spooky action at a distance”. Due to the enormous experimental progress today,
not only the old predictions were confirmed, but novel phenomena were
discovered, including, for example, multi-particle entanglement and quantum
teleportation.
These are
not just intellectual curiosities, but they lay the foundation for a possible
future information technology, with applications such as quantum communication,
quantum cryptography and quantum computation. In the talk,
some of
the most recent experimental results, particularly on long-distance quantum
communication and on the implementation of quantum states in higher-dimensional
Hilbert spaces, will be presented and future possible applications
will be
discussed. These will, for example, include experiments using satellite-based
quantum communication on a
world-wide
scale. It would be interesting to hear Albert Einstein’s reaction to these
developments, particularly
in view of
his statement towards the end of his life that despite years of conscious
brooding, he did not come closer to answering the question “What is light?”