In his live public lecture at Perimeter Institute on February 5, 2020, astronomer Bryan Gaensler (Dunlap Institute for Astronomy and Astrophysics, University…
The discovery could change how we understand “the smallest to the largest objects in the universe,” a co-author of the study said.
The so-called superconducting (SC) diode effect is an interesting nonreciprocal phenomenon, occurring when a material is SC in one direction and resistive in the other. This effect has been the focus of numerous physics studies, as its observation and reliable control in different materials could enable the future development of new integrated circuits.
Researchers at RIKEN and other institutes in Japan and the United States recently observed the SC diode effect in a newly developed device comprised of two coherently coupled Josephson junctions. Their paper, published in Nature Physics, could guide the engineering of promising technologies based on coupled Josephson junctions.
“We experimentally studied nonlocal Josephson effect, which is a characteristic SC transport in the coherently coupled Josephson junctions (JJs), inspired by a previous theoretical paper published in NanoLetters,” Sadashige Matsuo, one of the researchers who carried out the study, told Phys.org.
https://youtube.com/watch?v=wc8qRKm9MLs
Boltzmann brain is another bizarre consequence of laws of physics. It’s a configuration of matter, similar to our brains; a statistical fluctuation risen out of thermal equilibrium, a conscious observer created by a sudden decrease in entropy, having false memories of a grand structure exactly like our universe.
Given enough time, every single possibility allowed by the physical laws in our most likely closed universe must eventually occur, including one with a fluctuated brain, sitting in the middle of nowhere, having the exact same thoughts that you are having right now.
Have we found the smoking-gun evidence for modified gravity? Were Einstein and Newton both wrong about gravity?
#gravity #breakthrough #physics.
Continue reading “Have Physicists Proved Gravity is Breaking Down” »
Creating novel materials by combining layers with unique, beneficial properties seems like a fairly intuitive process—stack up the materials and stack up the benefits. This isn’t always the case, however. Not every material will allow energy to travel through it the same way, making the benefits of one material come at the cost of another.
Using cutting-edge tools, scientists at the Center for Functional Nanomaterials (CFN), a U.S. Department of Energy (DOE) User Facility at Brookhaven National Laboratory, and the Institute of Experimental Physics at the University of Warsaw have created a new layered structure with 2D materials that exhibits a unique transfer of energy and charge. Understanding its material properties may lead to advancements in technologies such as solar cells and other optoelectronic devices. The results were published in the journal Nano Letters.
Transition metal dichalcogenides (TMDs) are a class of materials structured like sandwiches with atomically thin layers. The meat of a TMD is a transition metal, which can form chemical bonds with electrons on their outermost orbit or shell, like most elements, as well as the next shell. That metal is sandwiched between two layers of chalcogens, a category of elements that contains oxygen, sulfur, and selenium.
Researchers have developed a novel material using tiny organic crystals that convert light into a substantial mechanical force able to lift 10,000 times its own mass. Without the need for heat or electricity, the photomechanical material could one day drive wireless, remote-controlled systems that power robots and vehicles.
Photomechanical materials are designed to transform light directly into mechanical force. They result from a complex interplay between photochemistry, polymer chemistry, physics, mechanics, optics, and engineering. Photomechanical actuators, the part of a machine that helps achieve physical movements, are gaining popularity because external control can be achieved simply by manipulating light conditions.
Researchers from the University of Colorado, Boulder, have taken the next step in the development of photomechanical materials, creating a tiny organic crystal array that bends and lifts objects much heavier than itself.
The universe is not static or silent, as is commonly believed. It moves, expands and… vibrates. And this is where gravitational waves play an important role: tiny ripples in the fabric of space and time that occur when massive objects accelerate or collide.
Gravitational waves are generally very difficult to detect because they are usually very short and weak, and get lost in the background noise of the universe.
For this reason, until now only some of them have been captured with very sensitive instruments such as the Laser Interferometer Gravitational-Wave Observatory (LIGO), which measures the distortions caused by the waves in two laser light beams separated by kilometers.
Those looking to make their academic departments more diverse, equitable, and inclusive can learn from previous wins and setbacks.
Achieving equity, diversity, and inclusion is a popular mantra—but is it important for the future of physics? A resounding yes to that question appeared several years ago in a public letter from more than 2000 physicists. The letter was a response to US Supreme Court Chief Justice John Roberts, who, in a high-profile affirmative action case, questioned whether minority students would bring a unique perspective to physics. But what are the arguments for increasing diversity and inclusion? Some are practical: The change would make more talent available to our profession. Diverse teams of people also perform better than homogeneous ones. Another argument is moral: to have bias, discriminate, or exclude African Americans and other people of color, women, people with disabilities, or sexual and gender minorities is incompatible with basic human rights.
To improve access to large data sets, scientists are looking to cloud-based solutions for data management.
In the coming decade, big projects like the Large Hadron Collider (LHC) and the Square Kilometre Array (SKA) are each expected to produce an exabyte of data yearly, which is about 20 times the digital content of all the written works throughout human history. This information overload requires new thinking about data management, which is why scientists have begun to look to the “cloud.” In such a scenario, data would be stored and analyzed remotely, with the advantage that information would become more accessible to a wider scientific community. Efforts are underway to create “science clouds,” but disagreements remain over their structure and implementation. To discuss these details, around 60 scientists came together for The Science Cloud meeting in Bad Honnef, Germany. The attendees shared lessons from past and ongoing projects in the hope of building the groundwork for a future scientific computing infrastructure.
