The Quantum Internet | Stephanie Wehner | TEDxVienna (15 min)
https://www.youtube.com/watch?v=XzPi29O6DAc
The goal of a quantum internet is to connect quantum
processors using long distance quantum communication.
The internet has had a revolutionary impact on our world.
The long-term vision of this talk is to build a matching
quantum internet that will operate in parallel to the
internet we have today. This quantum internet will enable
long-range quantum communication in order to achieve
unparalleled capabilities that are provably impossible using
only classical means.
Stephanie starts by exploring what a quantum internet is
good for, and gives an intuition why quantum communication
is so powerful. She proceeds from the state of the art
today, towards stages for a full blown quantum internet. As
an example, she discusses the efforts of the EU quantum
internet alliance including the planned demonstration
network connecting four Dutch cities in 2020. Stephanie
Wehner is an Antoni van Leeuwenhoek Professor at QuTech,
Delft University of Technology, where she leads the Quantum
Internet efforts. Her passion is the theory of quantum
information in all its facets, and she has written numerous
scientific articles in both physics and computer science. In
a former life, she worked as a professional hacker in
industry. This talk was given at a TEDx event using the TED
conference format but independently
Wikipedia -- Quantum network
https://en.wikipedia.org/wiki/Quantum_network
Quantum networks form an important element of quantum
computing and quantum communication systems. In general,
quantum networks allow for the transmission of quantum
information (quantum bits, also called qubits), between
physically separated quantum processors. A quantum processor
is a small quantum computer being able to perform quantum
logic gates on a certain number of qubits.
Quantum Cryptography Explained (8+ min)
https://www.youtube.com/watch?v=UiJiXNEm-Go
With recent high-profile security decryption cases,
encryption is more important than ever. Much of your browser
usage and your smartphone data is encrypted. But what does
that process actually entail? And when computers get smarter
and faster due to advances in quantum physics, how will
encryption keep up?
Quantum Teleportation From Space Achieved by China! (9+ min)
https://www.youtube.com/watch?v=dWc6Goy6cRk
Chinese team sends quantum keys to ground stations and
teleports ground to satellite signals
https://phys.org/news/2017-08-chinese-team-quantum-keys-ground.html
Wikipedia -- Post-quantum cryptography
https://en.wikipedia.org/wiki/Post-quantum_cryptography
Post-quantum cryptography (sometimes referred to as
quantum-proof, quantum-safe or quantum-resistant) refers to
cryptographic algorithms (usually public-key algorithms)
that are thought to be secure against an attack by a quantum
computer. As of 2018, this is not true for the most popular
public-key algorithms, which can be efficiently broken by a
sufficiently strong hypothetical quantum computer. The
problem with currently popular algorithms is that their
security relies on one of three hard mathematical problems:
the integer factorization problem, the discrete logarithm
problem or the elliptic-curve discrete logarithm problem.
All of these problems can be easily solved on a sufficiently
powerful quantum computer running Shor's algorithm. Even
though current, publicly known, experimental quantum
computers lack processing power to break any real
cryptographic algorithm, many cryptographers are designing
new algorithms to prepare for a time when quantum computing
becomes a threat. This work has gained greater attention
from academics and industry through the PQCrypto conference
series since 2006 and more recently by several workshops on
Quantum Safe Cryptography hosted by the European
Telecommunications Standards Institute (ETSI) and the
Institute for Quantum Computing.
Wikipedia -- Quantum teleportation
https://en.wikipedia.org/wiki/Quantum_teleportation
Quantum teleportation is a process by which quantum
information (e.g. the exact state of an atom or photon) can
be transmitted (exactly, in principle) from one location to
another, with the help of classical communication and
previously shared quantum entanglement between the sending
and receiving location. Because it depends on classical
communication, which can proceed no faster than the speed of
light, it cannot be used for faster-than-light transport or
communication of classical bits. While it has proven
possible to teleport one or more qubits of information
between two (entangled) atoms, this has not yet been
achieved between anything larger than molecules.
Although the name is inspired by the teleportation commonly
used in fiction, quantum teleportation is limited to the
transfer of information rather than matter itself. Quantum
teleportation is not a form of transportation, but of
communication: it provides a way of transporting a qubit
from one location to another without having to move a
physical particle along with it.
PBS Space Time Quantum Communication related Videos
https://www.youtube.com/results?search_query=PBS+Space+Time+Quantum+Communication
Quantum teleportation across a metropolitan fibre network
http://arxiv.org/abs/1605.08814
Record Distance for Quantum Cryptography
https://physics.aps.org/articles/v11/111
Physicists show that it is impossible to mask quantum information in correlations
https://phys.org/news/2018-06-physicists-impossible-mask-quantum.html?utm_source=nwletter&utm_medium=email&utm_campaign=daily-nwletter
High-speed quantum cryptographic communications with key
distribution speeds exceeding 10 Mbps
https://phys.org/news/2018-09-high-speed-quantum-cryptographic-key-exceeding.html
New method could lead to more powerful quantum sensors
https://phys.org/news/2018-11-method-powerful-quantum-sensors.html?utm_source=nwletter&utm_medium=email&utm_campaign=daily-nwletter
Physicists race to demystify Einstein's 'spooky' science
https://phys.org/news/2018-08-physicists-demystify-einstein-spooky-science.html
Light from ancient quasars helps confirm quantum entanglement
https://phys.org/news/2018-08-ancient-quasars-quantum-entanglement.html
sam.wormley@icloud.com