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Wouldn’t it be cool to have a little black hole in your office? You know, maybe as a trash bin. Or to move around the furniture. Or just as a kind of nerdy gimmick. Why can we not make black holes? Or can we? If we could, what could we do with them? And what’s a black hole laser? That’s what we’ll talk about today.

The Press and Teukolsky paper about the black hole bomb is here:
https://www.nature.com/articles/238211a0

The paper about black hole lasers by Corey and Jacobson is here:

Continue reading “What would it take to make a black hole? And what’s a black hole laser?” | >

There have appeared many new scientific discoveries since that time, and many of them shake the foundations of the famous theory. It’s full of gaps and unanswered questions. So doesn’t this mean it’s not that perfect?

In this video, I’ll tell you: how many dimensions can the Universe have? What if the world was made of liquid? And most importantly, you’ll find out why the Big Bang theory can be wrong.

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A researcher from Skoltech has filled in the gaps connecting quantum simulators with more traditional quantum computers, discovering a new computationally universal model of quantum computation, the variational model. The paper was published as a Letter in the journal Physical Review A. The work made the Editors’ Suggestion list.

A is built to share properties with a target quantum system we wish to understand. Early quantum simulators were ‘dedicated’—that means they could not be programmed, tuned or adjusted and so could mimic one or very few target systems. Modern quantum simulators enable some control over their settings, offering more possibilities.

In contrast to quantum simulators, the long-promised quantum computer is a fully programmable quantum system. While building a fully programmable quantum remains elusive, noisy quantum processors that can execute short quantum programs and offer limited programmability are now available in leading laboratories around the world. These quantum processors are closer to the more established quantum simulators.

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A team of researchers and engineers at Canadian company Xanadu Quantum Technologies Inc., working with the National Institute of Standards and Technology in the U.S., has developed a programmable, scalable photonic quantum chip that can execute multiple algorithms. In their paper published in the journal Nature, the group describes how they made their chip, its characteristics and how it can be used. Ulrik Andersen with the Technical University of Denmark has published a News & Views piece in the same journal issue outlining current research on quantum computers and the work by the team in Canada.

Scientists around the world are working to build a truly useful quantum that can perform calculations that would take traditional computers millions of years to carry out. To date, most such efforts have been focused on two main architectures—those based on superconducting electrical circuits and those based on trapped-ion technology. Both have their advantages and disadvantages, and both must operate in a supercooled environment, making them difficult to scale up. Receiving less attention is work using a photonics-based approach to building a quantum computer. Such an approach has been seen as less feasible because of the problems inherent in generating quantum states and also of transforming such states on demand. One big advantage photonics-based systems would have over the other two architectures is that they would not have to be chilled—they could work at room temperature.

In this new effort, the group at Xanadu has overcome some of the problems associated with photonics-based systems and created a working programmable photonic quantum chip that can execute multiple algorithms and can also be scaled up. They have named it the X8 photonic quantum processing unit. During operation, the is connected to what the team at Xanadu describe as a “squeezed light” source—infrared laser pulses working with microscopic resonators. This is because the new system performs continuous variable quantum computing rather than using single-photon generators.

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Scientists have momentarily restored a faint twinkle of life to dying cells in the human eye.

In order to better understand the way nerve cells succumb to a lack of oxygen, a team of US researchers measured activity in mouse and human retinal cells soon after their death.

Amazingly, with a few tweaks to the tissue’s environment, they were able to revive the cells’ ability to communicate hours later.

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In November 2018, NASA InSight landed in the Elysium Planitia region of Mars with the goal of studying the planet’s deep interior for the first time by using seismic signals to learn more about the properties of the planet’s crust, mantle, and core. Join us live at 11 a.m. PT (2 p.m. ET/1800 UTC) on May 17 as agency leadership and mission team members highlight the spacecraft’s science accomplishments, share details on its power situation, and discuss its future.

Speakers:
Lori Glaze, director of NASA’s Planetary Science Division at NASA Headquarters.
Bruce Banerdt, InSight principal investigator, NASA’s Jet Propulsion Laboratory.
Kathya Zamora Garcia, InSight deputy project manager, JPL

Credit: NASA/JPL-Caltech

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“Scientists suspect that a ”fifth force” may be at work in space. This force, which they believe is mediated by a hypothetical particle called a symmetron is responsible for creating invisible walls in space.

The walls aren’t necessarily like the walls of a room. Instead, they are more like barriers. And, they could help explain an intriguing part of space that has left astronomers scratching their heads for quite a while.

BGR.

Scientists may have found an explanation for the invisible walls in space that hold galaxies in orbit around larger galaxies.

Continue reading “Mysterious invisible walls may have been discovered in outer space” | >

Foresight Molecular Machines Group.
Program & apply to join: https://foresight.org/molecular-machines/

Joe Lyding.
Silicon-Based Nanotechnology: There’s Still Plenty of Room at the Bottom.
Joe Lyding is a distinguished professor in Electrical and Computer Engineering at the University of Illinios. His career includes constructing the first atomic resolution scanning tunneling microscope, discovering new industrial uses for deuterium, studying quantum size effects down to 2nm lateral graphene dimensions, and much more. His current research is focused on carbon nanoelectronics. Specifically using carbon nanoelectronics based on carbon nanotubes and graphene for future semiconducting device applications.

Leonhard Grill.
Every Atom Counts: Manipulating Single Molecules on Surfaces.
Leonhard Grill is a professor at the University of Graz, where he leads a research group on nanoscience. His research focuses on imaging, characterization and manipulation of single functional molecules adsorbed on surfaces by using scanning tunneling microscopy, typically at cryogenic temperatures and under ultrahigh vacuum conditions.

Join us:

Continue reading “J. Lyding & L. Grill | Silicon-Based Nanotechnology & Manipulating Single Molecules on Surfaces” | >

According to The Guardian, there’s a team of researchers in northern Greece who have spent the last few years experimenting with ways to harvest metal though agriculture:

In a remote, beautiful field, high in the Pindus mountains in Epirus, they are experimenting with a trio of shrubs known to scientists as “hyperaccumulators”: plants which have evolved the capacity to thrive in naturally metal-rich soils that are toxic to most other kinds of life. They do this by drawing the metal out of the ground and storing it in their leaves and stems, where it can be harvested like any other crop. As well as providing a source for rare metals – in this case nickel, although hyperaccumulators have been found for zinc, aluminium, cadmium and many other metals, including gold – these plants actively benefit the earth by remediating the soil, making it suitable for growing other crops, and by sequestering carbon in their roots. One day, they might supplant more destructive and polluting forms of mining.

Imagine, finding a way to pull minerals out of the Earth … without violent colonization and destructive mining practices. Maybe us lowly humans could learn a thing or two from the flowers!

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