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Thursday, 05 Oct. 2023 |
Video-Recording for any system with MP4-support - Video.mp4 (ca. 320 Mb) |
18:15 – 19:00 |
“Entanglement Detection
and Applications"
Prof.
Mohamed Bourennane
(Fysikum)
Abstract:
Entanglement is one of the most puzzling
features of quantum theory and
of great importance for the new field of
quantum information theory.
The determination of whether a given state
is entangled or not is one of the most
challenging open problems of this field.
For the experimental detection of
entanglement Bell inequalities are widely
used. However, even for two-qubit systems
there exist entangled states which do not
violate any Bell inequality.
The tool of choice in this case is the
Peres-Horodecki criterion as it gives a
simple sufficient and necessary condition
for entanglement. Yet, the situation
is much more complicated for higher
dimensional and multipartite systems,
where simple necessary and sufficient
conditions are not known.
Entanglement is key resource in quantum
communication and computation tasks
such as quantum cryptography, quantum
teleportation and factoring large prime
numbers. In this talk, I give overview
about entanglement and our efforts on the
detection and characterization of
multipartite entanglement, bound entanglement,
measurement-device-independent
entanglement witness and applications in
quantum information processing.