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A small twist allowed scientists to capture a rare quantum phase that has been under the shadows for decades.


“Wigner molecular crystals are important because they may exhibit novel transport and spin properties that could be useful for future quantum technologies such as quantum simulations,” researchers at the Lawrence Berkeley National Laboratory (LBL) note.

For the first time, LBL researchers have captured direct images of the Wigner molecular crystal using scanning tunneling microscopy (STM) —- an imaging technique that produces high-resolution visuals of materials at the atomic scale.

“We are the first to directly observe this new quantum phase, which was quite unexpected. It’s pretty exciting,” said Feng Wang, one of the study authors and a physicist at the University of California, Berkeley.

This was Mastercard in March: You probably do it every day without a second thought — shop online with your credit card, or install an update on your phone, or send a confidential file to a co-worker.


Mastercard’s efforts include a pilot to test whether quantum key distribution would work on its complex global network.

Quantum theory is distinguished by its apparent indeterminism, a feature that raises the question: Is this uncertainty inherent to Nature, or might…


Johannes Fankhauser

Institute for Theoretical Physics, University of Innsbruck, Technikerstraße 21a, 6,020 Innsbruck, Austria Faculty of Philosophy, University of Oxford, Woodstock Road, Oxford OX2 6GG, UK

Get full text pdfRead on arXiv VanityComment on Fermat’s library.

The combined results also speak to a more fundamental goal. For decades, the quantum computing community has been trying to establish quantum advantage —a task that quantum computers can do that a classical one would struggle with. Usually, researchers understand quantum advantage to mean that a quantum computer can do the task in far fewer steps.

The new papers show that quantum memory lets a quantum computer perform a task not necessarily with fewer steps, but with less data. As a result, researchers believe this in itself could be a way to prove quantum advantage. “It allows us to, in the more near term, already achieve that kind of quantum advantage,” said Hsin-Yuan Huang, a physicist at Google Quantum AI.

But researchers are excited about the practical benefits too, as the new results make it easier for researchers to understand complex quantum systems.

Did the laws of physics come into being at the Big Bang?

Watch the full talk at https://iai.tv/video/the-laws-of-physics-are-not-fixed-joao-…escription.

We think that the laws of physics are unchanging and cannot be violated. Join pioneering physicist, João Magueijo, as he argues that everything we thought we knew about the laws of physics is wrong. They do change. And they can be violated. What’s more, a new understanding of these laws could help solve the mystery of dark matter.

#physics #science #speedoflight.

João Magueijo is a Portuguese cosmologist and professor in theoretical physics at Imperial College London. He is a pioneer of the varying speed of light (VSL) theory.

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Earlier this year, experiments shattered expectations by pushing the limits of what classical computing was believed to be capable of. Not only did the old fashioned binary technology crack a problem considered to be unique to quantum processing, it outperformed it.

Now physicists from the Flatiron Institute’s Center for Computational Quantum Physics in the US have an explanation for the feat which could help better define the boundaries between the two radically different methods of number-crunching.

The problem involves simulating the dynamics of what’s known as a transverse field Ising (TFI) model, which describes the alignment of quantum spin states between particles spread across a space.

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Hello and welcome! My name is Anton and in this video, we will talk about recent discoveries about quantum computers.
Links:
https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.22.034003
http://cjc.ict.ac.cn/online/onlinepaper/wc-202458160402.pdf.
https://arxiv.org/pdf/2307.03236
https://www.science.org/doi/10.1126/sciadv.adn8907
https://qiskit.github.io/qiskit-aer/stubs/qiskit_aer.QasmSimulator.html.
https://arxiv.org/abs/2302.00936
Previous videos:
https://youtu.be/Jl7RLrA69pg.


https://youtu.be/dPqNZ4aya8s.
#quantum #quantumcomputing #quantumcomputer.

0:00 Quantum Doom.
2:15 Recent quantum claims by Google and IBM
3:30 Why it’s so hard and what issues have to be solved.
4:50 No real world application?
6:30 Potential use: quantum internet.
8:00 Optical quantum computer that does something different.
9:50 Cracking encryption.
11:15 Conclusions and what’s next?

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Researchers at Paul Scherrer Institute (PSI), using muon spin rotation at the Swiss Muon Source (SmS), have discovered that a quantum phenomenon called time-reversal symmetry breaking takes place at the surface of the Kagome superconductor RbV₃Sb₅, occurring at temperatures up to 175 K.

This sets a new record for the temperature at which time-reversal symmetry breaking is observed among Kagome systems.