Spooky Action at a Distance and Quantum Technology

Quantum Communication

http://edu-observatory.org/olli/Quantum/Week3.html

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@gmail.com