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Category: quantum physics – Page 819

(Phys.org)—The relationship between communication complexity problems, Bell nonlocal correlations and the advantage of quantum over classical strategies has long been recognized, but has been confirmed in only two problems. Recently, however, scientists at University of Cambridge, University of Amsterdam, CWI, QuSoft, Gdansk University, Gdansk University of Technology, Adam Mickiewicz University, and Jagiellonian University employed a two-part method based on port-based teleportation – a scheme of quantum teleportation where a receiver has multiple (N) output ports and obtains the teleported state by merely selecting one of the N ports1,2. The researchers used the quantum protocol based on the given communication complexity game to construct a set of quantum measurements on a maximally entangled state to show that any large advantage over the best known classical strategy makes use of Bell nonlocal correlations. In so doing, the researchers assert, they have provided the missing link to the fundamental equivalence between Bell nonlocality and quantum advantage. Moreover, their results have significant implications for classical information processing and the development of more efficient teleportation protocols.

Dr. Sergii Strelchuk discussed the paper, “Quantum communication complexity advantage implies violation of a Bell inequality,” that he and his colleagues published in Proceedings of the National Academy of Sciences. Two of the challenges the scientists faced were encountered in demonstrating that any large advantage over the best known classical strategy makes use of Bell nonlocal correlations, and in providing the “missing link” (in the form of a general connection) between a large quantum advantage in communication complexity and Bell nonlocality. “One conceptual issue was finding a procedure that converts any quantum strategy for a given communication complexity problem into a set of correlations – that is, probability distributions corresponding to the measurement outcomes during the protocol,” Strelchuk tells Phys.org.

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1st, this article is full of inaccuracies such as 15 years away reported by NIST. Well, maybe 2 years ago they said this; however, in Jan. they and the NSA both stated that QC was less than 10 years away and a huge threat given the advancements by China. Also, this author writes that a hybrid system will be fine to withstand an attack by a hacker on QC. And, that s incorrect.

Also, if this article looks like another article published over a week ago by someone on Forbes; well it is because the author looks like copied word-for-word from the article in Forbes.

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Glad that folks have awaken to the fact that QC is indeed coming and best to learn about this technology and make it part of the IT’s Future State.

http://www.welivesecurity.com/2016/06/14/quantum-computation

Cryptography-armageddon/

ESET’s Cassius Puodzius takes an in-depth look at cryptography, exploring quantum computing (one of the resources in the toolkit of cryptanalysts).

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Exponential Finance celebrates the incredible opportunity at the intersection of technology and finance. Apply here to join Singularity University, CNBC, and hundreds of the world’s most forward-thinking financial leaders at Exponential Finance in June 2017.

Modern life is punctuated by market cycles.

One year the gears of commerce are whirring along. Businesses are hiring and investing. People are buying houses and cars, televisions and computers. Things are going great. Then a year later, the gears screech to halt—sweeping layoffs, plummeting investment, and crashing markets. No one’s buying anything.

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The things you learn on the DarkWeb. Wonder what will happen when more and more countries and folks onboard to the Quantum Internet, etc. Could we see one last massive apocalyptic raid on accounts, etc.?

X5 simplifies the process of stealing details from contactless debit cards, cloning fake debit cards.

A criminal group going under the name of The CC Buddies is selling a hi-tech device on the Dark Web that’s capable of copying details from contactless debit cards if held as close as eight centimeters away from a victim’s card.

CC Buddies claim that their device, named Contactless Infusion X5, can copy up to 15 bank cards per second, something that may come in hand if a crook is going through a crowd at a concert or through a crowded subway cart.

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Boy; wait until next month with China’s Quantum Launch.

By Munish Sharma.

Cyber has been one of the key discussion items during both Prime Minister Modi’s just concluded visit to the United States and President Xi Jinping’s visit to the US some nine months back. After Xi’s visit, China and the US signed a Cyber Agreement in October 2015. India and the US will ink a cyber agreement in the next sixty days. Notwithstanding these similarities, the intent of and expectations from these two agreements are fundamentally different; the former is an attempt to manage insecurity and the latter is a quest for security. An analysis of the joint statements issued at the end of the Modi and Xi visits to the US highlights the contrasting differences in India and China’s bilateral ties with the United States in the cyber realm.

China : US – Cyber and State Visit

Continue reading “India-US-China : US – Cyber And Bilateral Visits – Analysis” | >

Another article on Quantum Security; this time from Sydney (generating single photons to make communications and information secured).

With enough computing effort most contemporary security systems will be broken. But a research team at the University of Sydney has made a major breakthrough in generating single photons (light particles), as carriers of quantum information in security systems.

The collaboration involving physicists at the Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), an ARC Centre of Excellence headquartered in the School of Physics, and electrical engineers from the School of Electrical and Information Engineering, has been published in Nature Communications.

The team’s work resolved a key issue holding back the development of password exchange which can only be broken by violating the laws of physics. Photons are generated in a pair, and detecting one indicates the existence of the other. This allows scientists to manage the timing of photon events so that they always arrive at the time they are expected.

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New research demonstrates that quantum dots solve a key issue with current 3D printing materials. I spoke with Keroles Riad, PhD student at Concordia University Montreal, Quebec, Canada, about his thesis on the photostability of materials used for stereolithography 3D printing. The research was supervised by Prof. Paula Wood-Adams, Prof. Rolf Wuthrich of the Mechanical and industrial engineering department at Concordia and Prof. Jerome Claverie of the Chemistry department at the University of Quebec in Montreal.

While quantum dots have been shown to cure acrylics, Riad says this work is the first demonstration of the process in epoxy resin.

3D printing is often richly rewarding because it spans multiple disciplines. Here we look at a new thesis that advances the critical area of materials. The approach taken uses engineering, chemistry and physics to overcome the issue of stability present in current stereolithography processes. The results could form the basis of superior materials and wider use of 3D printing in many areas.

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For the first time, scientists have discovered a classic formula for pi in the world of quantum physics. Pi is the ratio between a circle’s circumference and its diameter, and is incredibly important in pure mathematics, but now scientists have also found it “lurking” in the world of physics, when using quantum mechanics to compare the energy levels of a hydrogen atom.

Why is that exciting? Well, it reveals an incredibly special and previously unknown connection between quantum physics and maths.

“I find it fascinating that a purely mathematical formula from the 17th century characterises a physical system that was discovered 300 years later,” said one of the lead researchers, Tamar Friedmann, a mathematician at the University of Rochester in the US. Seriously, wow.

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