David Crouse

139 Flips | 2 Magazines | 49 Likes | 3 Followers | @profcrouse | Keep up with David Crouse on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “David Crouse”

Scientists use graphene to squeeze light to just one atom thick paving the way for tiny switches and sensors

Breakthrough in light compression heralds dawn of a new age of technological possibilities<p>Graphene is regarded as one of the ultimate materials we …

A New Hypothesis Suggests That Parallel Universes Might Interact after All

A new conception of quantum mechanics rests on the idea that parallel universes exist, and that they interact with our own to create weird and …

Quantum Mechanics

Free-fall experiment could test if gravity is a quantum force

Despite decades of effort, a theory of quantum gravity is still out of grasp. Now a group of physicists have proposed an experimental test of whether …

Astronomers design low cost technology that allows Earth based telescopes to observe exoplanets better

Astronomers have designed a low-cost technology that allows telescopes on Earth to observe <b>planets beyond our solar system</b> with greater precision. …

Penn State

Physicists Prove that Time Travel is Possible by ‘Sending’ Light Particles into the Past

Scientists from the University of Queensland, Australia, have used single particles of light (photons) to simulate quantum particles travelling …

Particles

This Overlooked Theory Could Be The Missing Piece That Explains How The EM Drive Works

What if it doesn't break the laws of physics?<p>Ever since the EM drive first made headlines, science lovers have puzzled over how the propulsion system …

Could the theory which predicted gravitational waves be wrong?

The detection of gravitational waves scooped the 2017 Nobel physics prize. But in a Perimeter Institute lecture Erik Verlinde proposes a rather different theory of gravity<p>One of those big open questions that we have in physics goes like this.<p>Einstein’s theory of General Relativity is elegant and …

Physics

Scientists Use Party Gag to Explain NFL Brain Injury

Broken bottles share a lot with broken brains.<p>Several YouTube videos show cool bros smacking the mouth of a liquid-filled bottle to make its bottom …

First quantum computers need smart software

Early devices must solve real-world problems, urge Will Zeng and colleagues.<p>Subject terms:<p>Quantum physics<br>• Quantum information<br>• Mathematics and …

Flip-Flop Qubit Could Make Silicon the King of Quantum Computing

A quantum computing breakthrough could rival the superconducting approach favored by Google and IBM Photo: Quentin JonesDr. Guilherme Tosi and …

New supernova analysis reframes dark energy debate

The accelerating expansion of the Universe may not be real, but could just be an apparent effect, according to new research published in the journal …

Dark Matter

IBM Has Used Its Quantum Computer to Simulate a Molecule—Here’s Why That’s Big News

We just got a little closer to building a computer that can disrupt a large chunk of the chemistry world, and many other fields besides. A team of …

All the Science Fiction and Fantasy Books to Keep on Your Radar This Fall

Look, guys. This fall’s offering of books is huge. <i>Huge</i>. We’re not even going to suggest reading <i>all</i> of these, unless you yourself are some kind of …

Quantum backflow and scattering

Author(s): Henning Bostelmann, Daniela Cadamuro, and Gandalf LechnerBackflow is the phenomenon that the probability current of a quantum particle on …

Quantum Mechanics

The Quantum Rule That Makes Existence Possible

A new podcast, to cover an incredible story of why we can exist at all.<p>“Already in my original paper I stressed the circumstance that I was unable to …

Quantum Black Hole: The Measuring Stick Of The Universe

“<i>Attributed to Quantum black hole, Planck’s length which is the smallest indivisible achievable length, is a measuring stick of the universe and all</i> …

Negative-Mass Hydrodynamics in a Spin-Orbit–Coupled Bose-Einstein Condensate

Author(s): M. A. Khamehchi, Khalid Hossain, M. E. Mossman, Yongping Zhang, Th. Busch, Michael McNeil Forbes, and P. EngelsMeasurements of an …

Quantum Mechanics

We still don’t know how fast the Universe is expanding

Nearly 100 years after Hubble first showed us the Universe is expanding, we still don’t know its rate.<p><i>“In the far, far future, essentially all matter</i> …

Dark matter still missing

Chalk up one more loss for physicists searching for dark matter. Scientists with the XENON100 experiment have largely ruled out another experiment’s …

There's a theory that a hypermassive black hole spawned our universe

The most accepted theory of the origin of the universe is still the Big Bang. The theory proposes the universe started from a small singularity (the gravitational kind), then began to expand over the succeeding 13.8 billion years. Although this expansion has its own issues, a bigger question …

A New Gravity Theory Might Finally Explain Dark Matter

The universe is a weird, wild place.<p>The theory of gravity gets a little weird in a few spots in our universe. One of those spots is the outer edges …

Smallest sliver of time yet measured sees electrons fleeing atom

It’s like catching light in action. For the first time, physicists have measured changes in an atom to the level of zeptoseconds, or trillionths of a …

Matter Is No More Than Fluctuations In Vacuum

Scientists had been striving to explore what lies between planets, stars and galaxies and what medium electromagnetic waves propagate through. James …

Physics

What is the essence of the Unruh-effect?

The essence of the Unruh effect is basically that coordinate-transformations lead to different excitations/occupation numbers of the quantum fields. …

Physics

Could Dark Energy Be Caused By A Reaction To What's In The Universe?

Most of the forces and phenomena in the Universe have causes that can be easily uncovered. Two massive objects experience a gravitational force due to the fact that spacetime is curved by the presence of matter and energy. The Universe has expanded as it has over its history because of the changing …

Dark Matter

Our latest search for dark matter suggests we're looking in the wrong place

Deep underground, at the bottom of a mine in the Black Hills of South Dakota, scientists have been working for three years on one of the most …

How Fast Is The Universe Expanding? Conflicting Estimates Continue To Fuel Debate

That the universe is expanding is a well known fact. What is less well known is the rate at which this expansion is taking place.<p>Initially, …

New physics discovery could make time travel impossible

With apologies to time-traveling doctors throughout fiction, it seems that visiting the past might actually be impossible — and not just because we …

Physics

New and Improved Atomic Clocks Mean It's Time to Update Time

The latest system trims timekeeping errors to less 200 picoseconds over 25 days.<p>Physicists from the the National Metrology Institute of Germany have developed a new variant of atomic clock boasting up to 100 times the accuracy of today's traditional microwave-based atomic clocks.<p>The technology, …

Physics

Swifter pace of universe expansion baffles physicists

A discrepancy in the measurement of how quickly the universe is expanding has been found by researchers at the John Hopkins University in Baltimore, …