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Archive for the ‘quantum physics’ category: Page 505

Aug 20, 2018

Light from ancient quasars helps confirm quantum entanglement

Posted by in categories: particle physics, quantum physics

Last year, physicists at MIT, the University of Vienna, and elsewhere provided strong support for quantum entanglement, the seemingly far-out idea that two particles, no matter how distant from each other in space and time, can be inextricably linked, in a way that defies the rules of classical physics.

Take, for instance, two particles sitting on opposite edges of the universe. If they are truly entangled, then according to the theory of quantum mechanics their physical properties should be related in such a way that any measurement made on one particle should instantly convey information about any future measurement outcome of the other particle—correlations that Einstein skeptically saw as “spooky action at a distance.”

In the 1960s, the physicist John Bell calculated a theoretical limit beyond which such correlations must have a quantum, rather than a classical, explanation.

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Aug 18, 2018

Researchers Build Quantum Transistor Using a Single Atom

Posted by in categories: computing, particle physics, quantum physics

The sub-microscopic switch can also operate at room temperature, marking a major breakthrough.

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Aug 18, 2018

With Q#, Microsoft is throwing programmers the keys to quantum

Posted by in categories: computing, information science, quantum physics

Quantum computers aren’t yet practical, but Microsoft has already developed a programming language for them. Q# works inside Visual Studio, just like most other languages, and could offer aspiring programmers a chance to learn the basics of quantum physics through trial-and-error.

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Aug 17, 2018

A step closer to a theory of quantum gravity

Posted by in category: quantum physics

Physicists reveal a new approach to resolving different predictions from relativity and quantum physics. Phil Dooley reports.

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Aug 16, 2018

Physicists fight laser chaos with quantum chaos to improve laser performance

Posted by in categories: biotech/medical, quantum physics

To tame chaos in powerful semiconductor lasers, which causes instabilities, scientists have introduced another kind of chaos.

High-powered semiconductor lasers are used in materials processing, biomedical imaging and industrial research, but the emitted light they produce is affected by instabilities, making it incoherent.

The instabilities in the laser are caused by optical filaments; light structures that move randomly and change with time, causing chaos. Removing these instabilities has long been a goal in physics, but previous strategies to reduce filaments have usually involved reducing the power of the laser.

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Aug 16, 2018

Mapping the future direction for quantum research

Posted by in category: quantum physics

The way research in quantum technology will be taken forward has been laid out in a revised roadmap for the field.

Published today in the New Journal of Physics, leading European quantum researchers summarise the field’s current status, and examine its challenges and goals.

In the roadmap:

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Aug 16, 2018

Hologram Computers

Posted by in categories: 3D printing, augmented reality, biotech/medical, entertainment, holograms, quantum physics, robotics/AI, science, security, space travel, virtual reality, wearables

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Aug 14, 2018

Researcher accurately determines energy difference between two quantum states

Posted by in categories: cosmology, particle physics, quantum physics

A kiwi physicist has discovered the energy difference between two quantum states in the helium atom with unprecedented accuracy, a ground-breaking discovery that contributes to our understanding of the universe and space-time and rivals the work of the world’s most expensive physics project, the Large Hadron Collider.

Our understanding of the universe and the forces that govern it relies on the Standard Model of particle physics. This model helps us understand space-time and the fundamental forces that hold everything in the universe in place. It is the most accurate scientific theory known to humankind.

But the Standard Model does not fully explain everything, for example it doesn’t explain gravity, dark matter, dark energy, or the fact that there is way more matter than antimatter in the universe.

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Aug 14, 2018

Einstein’s equivalence principle updated with a dash of quantum

Posted by in category: quantum physics

New, highly sensitive experiments required to find potential violations.

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Aug 13, 2018

Quantum formulation of the Einstein equivalence principle

Posted by in category: quantum physics

The physical conditions that support a geometric interpretation of spacetime, such as the equivalence between rest and inertial mass, are shown not to be necessarily valid in the quantum regime, and a quantum formulation is provided.

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