A joint China-Austria team has performed quantum key distribution between the quantum-science satellite Micius and multiple ground stations located in Xinglong (near Beijing), Nanshan (near Urumqi), and Graz (near Vienna). Such experiments demonstrate the secure satellite-to-ground exchange of cryptographic keys during the passage of the satellite Micius over a ground station. Using Micius as a trusted relay, a secret key was created between China and Europe at locations separated up to 7,600 km on the Earth.
The 50-qubit quantum computer could allow for advances in materials science and machine learning, among other fields.
2018’s Top 10 anniversaries include notable birthdays and discoveries in math, science and medicine.
A team from Griffith’s Centre for Quantum Dynamics in Australia have demonstrated how to rigorously test if pairs of photons – particles of light – display Einstein’s “spooky action at a distance”, even under adverse conditions that mimic those outside the lab.
In literature, the potential existence of extra dimensions was discussed in Edwin Abbott’s satirical novel “Flatland: A Romance of Many Dimensions” (1884), portraying the Victorian society in 19th century England as a hierarchical two-dimensional world, incapable of realizing its narrow-mindedness due to its lower-dimensional nature.
A complete classification could lead to a wealth of new materials and technologies. But some exotic phases continue to resist understanding.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor Gerhard Rempe at the Max Planck Institute of Quantum Optics (MPQ) have now achieved a major breakthrough: they demonstrated the long-lived storage of a photonic qubit on a single atom trapped in an optical resonator. The coherence time of the stored quantum bit outlasts 100 milliseconds and therefore matches the requirement for the creation of a global quantum network in which qubits are directly teleported between end nodes. “The coherence times that we achieve represent an improvement by two orders of magnitude compared to the current state-of-the-art,” says Professor Rempe. The study is published in Nature Photonics today.
Research teams all over the world are exploring different ways to design a working computing chip that can integrate quantum interactions. Now, UNSW engineers believe they have cracked the problem, reimagining the silicon microprocessors we know to create a complete design for a quantum computer chip that can be manufactured using mostly standard industry processes and components.
Back in September, we talked about the groundwork Microsoft was laying for quantum computing with a new programming language in development. Not even three months later,Â Microsoft is ready to toss a free preview version of that new language to the public and it’s called the Quantum Development Kit. That dev kit includes the Q# programming
String theory has so far failed to live up to its promise as a way to unite gravity and quantum mechanics. At the same time, it has blossomed into one of the
Scientists just took a big step towards the goal of quantum computers, and even a quantum internet to connect them, after successfully using photons to transfer quantum information between a cold atomic gas and a solid crystal.
Google Doodle honors German physicist, mathematician and Nobel laureate Max Born on what would be his 135th birthday
Excitonium sounds like a made-up substance from a children’s graphic novel. But it is an actual scientific word, coined 50 years ago to describe new a type of matter, which scientists believed should exist, but weren’t able to prove-until now. Physicists at the University of Illinois said that they have now proven that excitonium really …
Does the quantum state ultimately represent some objective aspect of reality, or is it a way of characterizing something about us,…
Nearly 75 years ago, Nobel Prize-winning physicist Erwin Schrödinger wondered if the mysterious world of quantum mechanics played a role in biology. A recent finding by Northwestern University’s Prem Kumar adds further evidence that the answer might be yes.
As physicists extend the 19th-century laws of thermodynamics to the quantum realm, theyâre rewriting the relationships among energy, entropy and information.
A breakthrough in creating atomic qubits makes useful quantum computing more imminent.
Edward Witten reflects on the meaning of dualities in physics and math, emergent space-time, and the pursuit of a complete description of nature.
A team at the University of Sydney and Microsoft, in collaboration with Stanford University in the US, has miniaturised a component that is essential for the scale-up of quantum computing. The work constitutes the first practical application of a new phase of matter, first discovered in 2006, the so-called topological insulators.
Ideas that originate in particle physics have an uncanny tendency to appear in the most diverse mathematical fields. This is especially true for string theory. Its stimulating influence in mathematics will have a lasting and rewarding impact, whatever its final role in fundamental physics turns out to be. The number of disciplines that it touches is dizzying: analysis, geometry, algebra, topology, representation theory, combinatorics, probability-the list goes on and on.
Another step along the path towards quantum computers has been completed. This is a database search mechanism. The system has recently been tested for future quantum computers at the Karlsruhe Institute of Technology.
Quantum computing could be the downfall of bitcoin Two technologies that could shape the future – blockchain and quantum computing – could potentially be at odds.
How two Dutch physicists investigated a mysterious quantum property, used a nonsensical analogy, and brought about a revolution
Japan has unveiled its first quantum computer prototype, amid a global race to build ever-more powerful machines with faster speeds and larger brute force that are key towards realising the full potential of artificial intelligence.
Building a quantum internet.
Lasers bounced off satellites replicate classic “delayed choice” experiment
Physicists theorize that a new âtraversableâ kind of wormhole could resolve a baffling paradox and rescue information that falls into black holes.
D-Wave system shows quantum computers can learn to detect particle signatures in mountains of data, but doesn’t outpace conventional methods — yet
Swiss researchers have successfully entangled 16 million atoms with a single photon, but macroscopic results are a long way off. Michael Lucy reports.
Manufacturing will be key to quantum computing, but don’t throw out your current processor just yet.
It doesn’t even break the laws of physics.
Berkelium defies quantum mechanics, according to breakthrough new research.
There are two tantalizing mysteries about our universe, one dealing with its final fate and the other with its beginning, that have…
There is no red pill.
In Schrödinger’s famous thought experiment, a cat seems to be both dead and alive-an idea that strains credulity. These days, cats still don’t act this way, but physicists now regularly create analogues of Schrödinger’s cat in the lab by smearing the microscopic quantum world over longer and longer distances. Such “cat states” have found many homes, promising more sensitive quantum measurements and acting as the basis for quantum error-correcting codes-a necessary component for future error-prone quantum computers.
The potential for photon entanglement in quantum computing and communications has been known for decades. One of the issues impeding its immediate application is the fact that many photon entanglement platforms do not operate within the range used by most forms of telecommunication.
The researchers, from Cambridge, Southampton and Cardiff Universities in the UK and the Skolkovo Institute of Science and Technology in Russia, have used quantum particles known as polaritons – which are half light and half matter – to act as a type of ‘beacon’ showing the way to the simplest solution to complex problems. This entirely new design could form the basis of a new type of computer that can solve problems that are currently unsolvable, in diverse fields such as biology, finance or space travel.
Since the mid-twentieth century, two theories of physics have offered powerful yet incompatible models of the physical universe.
A quantum relay race.
IBM conducted a study on beryllium hydride with a quantum computer implementing quantum algorithm capable of efficiently computing the lowest energy states
Can a fluid analogue of a black hole point physicists toward the theory of quantum gravity, or is it a red herring?
NIST scientists have achieved a world record in detecting the intensity of an ultra-faint source of light, equaling the capabilities of the deep-space instruments on the Hubble Space Telescope but operating 100 times faster and with equivalent accuracy.
Researchers at Caltech have developed a computer chip that can store quantum information in the form of light, at the nanoscale. The breakthrough is the latest step towards quantum computers and networks, which would allow information to be processed and transmitted faster and with smaller devices.
Physicists from the University of Basel have developed a memory that can store photons. These quantum particles travel at the speed of light and are thus suitable for high-speed data transfer. The researchers were able to store them in an atomic vapor and read them
This is the breakthrough we’ve been waiting for.
(Phys.org)-Is entanglement really necessary for describing the physical world, or is it possible to have some post-quantum theory without entanglement?
As China moves closer to building a working quantum communications network, the possibility of a quantum internet becomes more and more real.
A study by MIT researchers shows that collections of ultracold molecules can retain the information stored in them for hundreds of times longer than previously achieved in these materials. These clusters might thus serve as “qubits,” the basic building blocks of quantum computers.
Chemists have largely ignored quantum mechanics. But it now turns out that this strange physics has a huge effect on biochemical reactions.