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Updated: 3 days 21 hours ago

Writing the future of rewritable memory

Mon, 07/23/2018 - 12:19
Scientists at the University of Alberta in Edmonton, Canada have created the most dense, solid-state memory in history that could soon exceed the capabilities of current hard drives by 1,000 times.

Ytterbium: The quantum memory of tomorrow

Mon, 07/23/2018 - 11:00
Quantum communication and cryptography are the future of high-security communication. But many challenges lie ahead before a worldwide quantum network can be set up, including propagating the quantum signal over long distances. One of the major challenges is to create memories with the capacity to store quantum information carried by light. Researchers at the University of Geneva (UNIGE), Switzerland, in partnership with CNRS, France, have discovered a new material in which an element, ytterbium, can store and protect the fragile quantum information even while operating at high frequencies. This makes ytterbium an ideal candidate for future quantum networks, where the aim is to propagate the signal over long distances by acting as repeaters. These results are published in the journal Nature Materials.

Researchers report success with complex quantum states

Mon, 07/23/2018 - 08:00
Scientists from the Niels Bohr Institute at the University of Copenhagen have, for the first time, succeeded in producing, controlling and understanding complex quantum states based on two electron spins connected to a superconductor. The result has been published in Nature Communications, and has come about in a collaboration between the scientists of the Niels Bohr Institute, a scientist from abroad and last, but not least, a Master's thesis student.

Current noises of Majorana fermions

Mon, 07/23/2018 - 07:57
Majorana fermions are particles that are their own antiparticles. In condensed matter physics, zero-energy Majorana fermions obey non-abelian statistics, and can be used in fault-tolerant topological quantum computation. They are thus the subject of extensive studies. However, as Majorana fermions carry no electric charge, detecting them experimentally is still a challenge. A current noise study now provides a direct method for the detection of these novel particles.

Physicists demonstrate new method to make single photons

Mon, 07/23/2018 - 05:00
Scientists need individual photons for quantum cryptography and quantum computers. Leiden physicists have now experimentally demonstrated a new production method. Publication in Physical Review Letters on July 23rd.

World's fastest man-made spinning object could help study quantum mechanics

Fri, 07/20/2018 - 16:49
Researchers have created the fastest man-made rotor in the world, which they believe will help them study quantum mechanics.

Unusual sound waves discovered in quantum liquids

Fri, 07/20/2018 - 11:19
Ordinary sound waves—small oscillations of density—can propagate through all fluids, causing the molecules in the fluid to compress at regular intervals. Now physicists have theoretically shown that in one-dimensional quantum fluids not one, but two types of sound waves can propagate. Both types of waves move at approximately the same speed, but are combinations of density waves and temperature waves.

Reversing cause and effect is no trouble for quantum computers

Fri, 07/20/2018 - 05:57
Watch a movie backwards and you'll likely get confused—but a quantum computer wouldn't. That's the conclusion of researcher Mile Gu at the Centre for Quantum Technologies (CQT) at the National University of Singapore and Nanyang Technological University and collaborators.

New study could hold key to hack-proof systems

Tue, 07/17/2018 - 06:50
Major data breaches have made worldwide headlines of late but an international consortium of scientists—including a professor from Heriot-Watt—have developed a new technique that could result in hack-proof systems.

A step closer to quantum computers: Researchers show how to directly observe quantum spin effects

Tue, 07/17/2018 - 05:23
With companies like Google, Microsoft and IBM all racing to create the world's first practical quantum computer, scientists worldwide are exploring the potential materials that could be used to build them. Now, Associate Professor Yang Hyunsoo and his team from the Department of Electrical and Computer Engineering at the National University of Singapore (NUS) Faculty of Engineering have demonstrated a new method which could be used to bring quantum computing closer to reality.