Latest Quantum cryptography Stories
Physicists at the National Institute of Standards and Technology (NIST) have demonstrated entanglement"”a phenomenon peculiar to the atomic-scale quantum world"”in a mechanical system similar to those in the macroscopic everyday world. The work extends the boundaries of the arena where quantum behavior can be observed and shows how laboratory technology might be scaled up to build a functional quantum computer.The research, described in the June 4 issue of Nature,* involves a bizarre...
Researchers at UC Santa Barbara have recently demonstrated a breakthrough in the quantum control of photons, the energy quanta of light. This is a significant result in quantum computation, and could eventually have implications in banking, drug design, and other applications.In a paper to be published in today's issue of the journal Nature, UCSB physics researchers Max Hofheinz, John Martinis, and Andrew Cleland document how they used a superconducting electronic circuit known as a Josephson...
A team of physicists and engineers have demonstrated all-fibre quantum logic, where single photons are generated and used to perform the contolled-NOT quantum logic gate in optical fibres with high fidelity.The only quantum technology in practical use today is quantum cryptography and is currently limited in the distance over which secure communication may occur.More sophisticated quantum networks will require multiple nodes with the ability to implement small-scale quantum processing in...
Quantum cryptography, a completely secure means of communication, is much closer to being used practically as researchers from Toshiba and Cambridge University's Cavendish Laboratory have now developed high speed detectors capable of receiving information with much higher key rates, thereby able to receive more information faster.Published as part of IOP Publishing's New Journal of Physics' Focus Issue on 'Quantum Cryptography: Theory and Practice', the journal paper, 'Practical gigahertz...
Highlighting another challenge to the development of quantum computers, theorists at the National Institute of Standards and Technology (NIST) have shown* that a type of software operation, proposed as a solution to fundamental problems with the computers' hardware, will not function as some designers had hoped.Quantum computers"”if they can ever be realized"”will employ effects associated with atomic physics to solve otherwise intractable problems. But the NIST team has proved that the...
CANBERRA, Australia, March 3 /PRNewswire/ -- QuintessenceLabs, the leader in quantum communications technology for networking, communications, national security and defence, announces the world's most advanced commercial quantum communications technology incorporating telecom "bright" lasers. QuintessenceLabs, the leaders in ultrasecure, untappable quantum communications technology, today announced that, rapidly following its successful $2 million seed financing, including the award of a...
Delayed Quantum Image' Potentially Useful for Quantum ComputersPushing the envelope of Albert Einstein's "spooky action at a distance," known as entanglement, researchers at the Joint Quantum Institute (JQI) of the Commerce Department's National Institute of Standards and Technology (NIST) and the University of Maryland have demonstrated a "quantum buffer," a technique that could be used to control the data flow inside a quantum computer. Quantum computers could...
TAU research developing system to keep encryption safe from quantum computersOne of the themes of Dan Brown's The Da Vinci Code is the need to keep vital and sensitive information secure. Today, we take it for granted that most of our information is safe because it's encrypted. Every time we use a credit card, transfer money from our checking accounts -- or even chat on a cell phone -- our personal information is protected by a cryptographic system.But the development of quantum computers...
A team of physicists and engineers has demonstrated an optical device that filters two particles of light (or photons) based on the correlations between their polarization that are only allowed in the seemingly bizarre quantum world. This so called "entanglement filter" passes the pair of photons only if they inhabit the same quantum state, without the user (or anything else) ever knowing what that state is.This device will have many important applications to quantum technologies,...
The promise of quantum computing is that it will dramatically outshine traditional computers in tackling certain key problems: searching large databases, factoring large numbers, creating uncrackable codes and simulating the atomic structure of materials.A quantum step in that direction, if you'll pardon the pun, has been taken by Stanford researchers who announced their success in a paper published in the journal Nature. Working in the Ginzton Laboratory, they've employed ultrafast lasers...
