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Synopsis: Controlling the Rate of Nuclear Decay

The rate of a nuclear transition of thorium-229 can be controlled by placing the atom in a cavity or in a thin film—an effect that could lead to ultraprecise nuclear clocks. [Physics] Published Wed Mar 21, 2018

21cm to dark matter

The EDGES discovery of the 21cm absorption line at the cosmic dawn has been widely discussed on blogs and in popular press. Quite deservedly so. The observation opens a new window on the epoch when the universe as we know it was just beginning. Show More Summary

Exotic material exhibits an optical response in enormous disproportion to the stimulus

No earlier theory had envisioned that the responses would be so large! Scientists "poked" three crystals with pulses of light. Unexpectedly, the crystals exhibited the largest nonlinear optical response of any known crystal. The response was a huge amount of different colored light with twice the frequency of the pulse. Show More Summary

London Event Tomorrow!

Perhaps you were intrigued by the review of The Dialogues, my non-fiction graphic novel about science, in Saturday’s Spectator? Well, I’ll be talking about the book tomorrow (Thursday) at the bookshop Libreria in London at 7:00 pm. Maybe see you there! #thedialoguesbook -cvj Click to continue reading this post ? The post London Event Tomorrow! appeared first on Asymptotia.

Weird superconductor leads double life

Until about 50 years ago, all known superconductors were metals. This made sense, because metals have the largest number of loosely bound "carrier" electrons that are free to pair up and flow as electrical current with no resistance and 100 percent efficiency – the hallmark of superconductivity.

A new technique allows researchers to create real system cartographic maps at different scales

Researchers at the Institute of Complex Systems of the University of Barcelona (UBICS) have developed a method to represent network systems, such as postal services and the internet, at different scales, as if they were cartographic maps.

Physicists reveal material for high-speed quantum internet

Researchers from the Moscow Institute of Physics and Technology have rediscovered a material that could be the basis for ultra-high-speed quantum internet. Their paper published in npj Quantum Information shows how to increase the data...Show More Summary

Physicists made crystal lattice from polaritons

An international research team produced an analog of a solid-body crystal lattice from polaritons, hybrid photon-electron quasiparticles. In the resulting polariton lattice, the energy of certain particles does not depend on their speed. Show More Summary

Months-long, real-time generation of a time scale based on an optical clock

The National Institute of Information and Communications Technology (NICT) generated a real-time signal of an accurate time scale by combining an optical lattice clock and a hydrogen maser. The signal generated in this optical-microwave hybrid system continued for a half-year without interruption. Show More Summary

Good news from Moriond

Some days ago, Rencontres of Moriond 2018 ended with the CERN presenting a wealth of results also about the Higgs particle. The direction that the two great experiments, ATLAS and CMS, took is that of improving the measurements on the Standard Model as no evidence has been seen so far of possible new particles. Also, […]

This Week’s Hype

Many thanks to Sabine Hossenfelder for her efforts to debunk the attempt to use Hawking’s death as a platform for multiverse hype. See her posting at Backreaction for a good explanation of what is going on here. To summarize the … Continue reading ?

Statistical Mechanics Part II: The Ideal Gas

Read Part 1: Equilibrium Systems The Ideal Gas: Boltzmann’s Approach (The Microcanonical Ensemble) Consider a monatomic gas of ##N## non-interacting particles with mass ##m## occupying the volume ##V##. Since the particles of the gas do not interact with each other, it is not difficult to explicitly calculate ##\Omega_{E}##. The position of each particle is constrained to […]

Dark radiation may fix our broken understanding of the universe

We have two ways to measure the accelerating expansion of the universe, but they don’t line up. If dark matter gives off radiation, it could make them agree

Science icon Hawking's funeral set for March 31

Professor Steven Hawking's funeral will take place at the Cambridge University church on March 31, the scientist and cultural icon's family announced Tuesday.

Taming chaos: Calculating probability in complex systems

Daily weather patterns, brain activity on an EEG (electroencephalogram) and heartbeats on an EKG (electrocardiogram) each generate lines of complex data. To analyze this data, perhaps to predict a storm, seizure or heart attack, researchers must first divide up this continuous data into discrete pieces—a task that is difficult to perform simply and accurately.

Beyond the WIMP: Unique crystals could expand the search for dark matter

A new particle detector design proposed at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) could greatly broaden the search for dark matter—which makes up 85 percent of the total mass of the universe yet we don't know what it's made of—into an unexplored realm.

Researchers create microlaser that flies along hollow optical fiber

For the first time, researchers have optically trapped and propelled a particle-based laser for centimeters inside an optical fiber. The new flying microlaser enables highly sensitive temperature measurements along the length of the fiber and could offer a novel way to precisely deliver light to remote and inaccessible locations.

Abel Prize to Langlands

The 2018 Abel Prize has been awarded to Robert Langlands, an excellent choice. The so-called “Langlands program” has been a huge influence on modern mathematics, providing deep insight into the structure of number theory while linking together disparate fields of … Continue reading ?

Recent Developments in Constructive Field Theory

This week there’s a mini-workshop here at Columbia organized by the probabilists, on Recent Developments in Constructive Field Theory. I’ll be attending some of the talks, will write more here if I can come up with something constructive to say. … Continue reading ?

Presumptuous Blogging

John Horgan at Scientific American today has an interview with Martin Rees in which Rees says: It’s presumptuous (as some people like Woit and Smolin have done) to deride the way some manifestly brilliant people choose to dedicate their scientific … Continue reading ?

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