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Quantum Physics news

Fingerprints of quantum entanglement

Quantum entanglement is a key feature of quantum computing. Yet, how can researchers verify that a quantum computer actually incorporates large-scale entanglement? Conventional methods require a large number of repeated measurements, ...

dateFeb 15, 2018 in Quantum Physics
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Forging a quantum leap in quantum communication

Quantum communication, which ensures absolute data security, is one of the most advanced branches of the "second quantum revolution". In quantum communication, the participating parties can detect any attempt at eavesdropping ...

dateFeb 09, 2018 in Quantum Physics
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Light controls two-atom quantum computation

Some powerful rulers of the world may dream of the possibility to get in touch with their colleagues on different continents unnoticed by friends or foes. Someday, new quantum technologies could allow for making these wishes ...

dateFeb 07, 2018 in Quantum Physics
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New controls scale quantum chips

A fundamental barrier to scaling quantum computing machines is "qubit interference." In new research published in Science Advances, engineers and physicists from Rigetti Computing describe a breakthrough that can expand the ...

dateFeb 05, 2018 in Quantum Physics
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Quantum algorithm could help AI think faster

One of the ways that computers think is by analysing relationships within large sets of data. An international team has shown that quantum computers can do one such analysis faster than classical computers for a wider array ...

dateFeb 05, 2018 in Quantum Physics
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Trust is good, quantum trickery is better

An international team of scientists has proven, for the first time, the security of so-called device-independent quantum cryptography in a regime that is attainable with state-of-the-art quantum technology, thus paving the ...

dateFeb 01, 2018 in Quantum Physics
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Retrospective test for quantum computers can build trust

Tech companies are racing to make commercial quantum computers. A new scheme from researchers in Singapore and Japan could help customers establish trust in buying time on such machines—and protect companies from dishonest ...

New input for quantum simulations

An international group of researchers, including UvA physicist Michael Walter, have devised new methods to create interesting input states for quantum computations and simulations. The new methods can be used to simulate ...

Information engine operates with nearly perfect efficiency

Physicists have experimentally demonstrated an information engine—a device that converts information into work—with an efficiency that exceeds the conventional second law of thermodynamics. Instead, the engine's efficiency ...

Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered ...

Physicists create quantum state detector

Physicists from MIPT have teamed up with their colleagues in Russia and Great Britain and developed a superconducting quantum state detector. The new device can detect magnetic fields at low temperatures and is useful to ...

Quan­tum physics turned into tan­gi­ble re­al­ity

ETH physicists have developed a silicon wafer that behaves like a topological insulator when stimulated using ultrasound. They have thereby succeeded in turning an abstract theoretical concept into a macroscopic product.

Quantum speed limit may put brakes on quantum computers

Over the past five decades, standard computer processors have gotten increasingly faster. In recent years, however, the limits to that technology have become clear: Chip components can only get so small, and be packed only ...

Developing a secure, un-hackable net

A method of securely communicating between multiple quantum devices has been developed by a UCL-led team of scientists, bringing forward the reality of a large-scale, un- hackable quantum network.

What's the noise eating quantum bits?

Super powerful quantum computing relies on quantum bits, aka qubits, which are the equivalent of the classical bits used in today's computers. SQUIDs are being investigated for the development of qubits. However, system noise ...

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Pattern formation—the paradoxical role of turbulence
Converting heat into electricity with pencil and paper
Researchers create first superatomic 2-D semiconductor
Bringing a hidden superconducting state to light
Solar-powered rover approaching 5,000th Martian dawn

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