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Quantum Computing

Quantum Computing

Primitive quantum computers may already outperform standard machines for very specific tasks

Quantum bits (qubits) are the building blocks of quantum computers, but putting enough of them together in the one place to run computations like those expected in a standard computer is difficult to say the least. But now researchers have come up with a way to use even primitive quantum computers to run calculations that can already outperform the capabilities of classical computing for very specific tasks.Read More

Quantum Computing

IBM brings quantum computing to the masses

For the first time, IBM Research has thrown open public access to its new quantum processor via the IBM Cloud. Dubbed IBM Quantum Experience, this will provide users with the ability to experiment with individual quantum bits (qubits), process their own experiments, and run some of their own algorithms directly on IBM's quantum processor.Read More

Quantum Computing

"Quantum data bus" can relocate quantum information

While quantum computing has made great gains in recent years in terms of transistors and logic gates and reprogrammable chips, the technology still lacks one vital component: data transfer. This is a fundamental part of normal microprocessor operation; it involves the routing of information from one location to another. An international team of researchers has successfully trialled a "quantum data bus" that does just that, however, thanks to a technique called perfect state transfer. Read More

Science

Twisting puts the brakes on light in a vacuum

The speed of light is a universal constant, but, according to scientists at the University of Ottawa, not that constant. A team of researchers led by assistant professor Ebrahim Karimi has discovered that twisted light traveling through a vacuum moves slower than the speed set by Einstein's theory of relativity, which has implications for quantum computing and communications.Read More

Quantum Computing

New chip paves the way for optical quantum technology in laptops and smartphones

In quantum physics, entangled photons are the cornerstone of much cutting-edge technology research, including quantum communications, computing, and encryption. Now an international team of researchers claims to have incorporated a range of quantum technologies on a single integrated chip that is compatible with existing fiber and semiconductor applications, and may soon provide the means to build quantum circuits directly into laptops and cell phones.Read More

Quantum Computing

Quantum computers inch closer to reality thanks to entangled qubits in silicon

Practical quantum computers are still years away, but lately the pace of research seems to have picked up. After building the basic blocks of a quantum computer in silicon and storing quantum information for up to 30 seconds, scientists at the University of New South Wales (UNSW) have now violated a principle of classical physics to demo for the first time a pair of entangled, high-fidelity quantum bits (qubits) in silicon. The advance could help unleash the power of a new kind of computation that would affect everything from data cryptography to drug design, overnight deliveries and subatomic particle experiments.Read More

Quantum Computing

Quantum computing breakthrough: Qubits made from standard silicon transistors

In what is likely a major breakthrough for quantum computing, researchers from the University of New South Wales (UNSW) in Australia have managed for the first time to build the fundamental blocks of a quantum computer in silicon. The device was created using standard manufacturing techniques, by modifying current-generation silicon transistors, and the technology could scale up to include thousands, even millions of entangled quantum bits on a single chip. Gizmag spoke to the lead researchers to find out more.Read More

Electronics

Breakthrough photonic processor promises quantum computing leap

Optical quantum computers promise to deliver processing performance exponentially faster and more powerful than today's digital electronic microprocessors. To make this technology a reality, however, photonic circuitry must first become at least as efficient at multi-tasking as the microprocessors they are designed to replace. Towards this end, researchers from the University of Bristol and Nippon Telegraph and Telephone (NTT) claim to have developed a fully-reprogrammable quantum optical chip able to encode and manipulate photons in an infinite number of ways.Read More

Quantum Computing

New dimensions of quantum information added through hyperentanglement

In quantum cryptography, encoding entangled photons with particular spin states is a technique that ensures data transmitted over fiber networks arrives at its destination without being intercepted or changed. However, as each entangled pair is usually only capable of being encoded with one state (generally the direction of its polarization), the amount of data carried is limited to just one quantum bit per photon. To address this limitation, researchers have now devised a way to "hyperentangle" photons that they say can increase the amount of data carried by a photon pair by as much as 32 times.Read More

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