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Latest Josephson effect Stories

2014-04-22 12:12:43

Study presents latest theoretical advances on the dynamics of highly sensitive magnetometers Theoretical physicists are currently exploring the dynamics of a very unusual kind of device called a SQUID. This Superconducting Quantum Interference Device is a highly sensitive magnetometer used to measure extremely subtle magnetic fields. It is made of two thin regions of insulating material that separate two superconductors – referred to as Josephson junctions – placed in parallel into a...

2014-04-17 13:35:29

A team including MIPT physicist observed quantum superconductor-metal transition and superconducting glass The article "Collapse of superconductivity in a hybrid tin–grapheme Josephson junction array'" (authors: Zheng Han, Adrien Allain, Hadi Arjmandi-Tash,Konstantin Tikhonov, Mikhail Feigelman, Benjamin Sacépé,Vincent Bouchiat, published in Nature Physics on March 30, 2014, DOI:10.1038/NPHYS2929) presents the results of the first experimental study of the graphene-based quantum phase...

2013-11-25 16:41:00

A measuring device for superconductors breaks world records Weizmann Institute scientists have taken a quantum leap toward understanding the phenomenon known as superconductivity: They have created the world’s smallest SQUID – a device used to measure magnetic fields – which has broken the world record for sensitivity and resolution. Superconductivity is a quantum phenomenon that only occurs when certain materials are cooled to extremely low temperatures. Then, they lose all...

2012-04-18 21:40:51

Long predicted but never observed, coherent quantum phase slip can be harnessed to develop a novel class of quantum devices A new type of quantum bit called a "phase-slip qubit", devised by researchers at the RIKEN Advanced Science Institute and their collaborators, has enabled the world's first-ever experimental demonstration of coherent quantum phase slip (CQPS). The groundbreaking result sheds light on an elusive phenomenon whose existence, a natural outcome of the hundred-year-old...

2011-06-10 13:31:46

In recent years, UC Santa Barbara scientists showed that they could reproduce a basic superconductor using Einstein's general theory of relativity. Now, using the same theory, they have demonstrated that the Josephson junction could be reproduced. The results are explained in a recent issue of the journal Physical Review Letters. The Josephson junction, a device that was first discovered by Brian David Josephson in the early 1960's, is a main ingredient in applications of superconductivity....

2011-04-01 01:13:43

On April 8, 2011, the scientific community will celebrate the centennial of the discovery of superconductivity"”the ability of certain materials to conduct electricity without resistance when cooled below a specific temperature. Quantum voltage standards are among the successful practical applications of superconductivity, so to mark the anniversary, the National Institute of Standards and Technology (NIST) has created an online museum highlighting important accomplishments and...

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2010-10-27 13:38:57

Extending its 26-year tradition of innovative quantum voltage standards, researchers at the National Institute of Standards and Technology (NIST) have begun shipping a new 10-volt standard to users around the world. The programmable system measures both direct current (DC) and alternating current (AC) voltages. NIST AC/DC 10-volt standard chip. The new 10-volt system* builds on a number of previous NIST inventions, from the initial 1-volt standard in 1984 through the 2006 unveiling of the...

2009-07-23 13:45:12

Reports about swimmers menaced by giant squids off San Diego raised the ire of marine biologist Brad Seibel who found the awesome monsters are really timid. And, afraid of the light. I want to spread the word that they aren't the aggressive man-eaters as they have been portrayed, said Seibel who has taken moonlight swims surrounded by a big gang of squids. For years Seibel, a biologist at the University of Rhode Island, had heard stories claiming that a Humboldt squid will devour a dog in...

2009-06-03 16:22:45

U.S. scientists have determined certain squids can detect light through a symbiotic organ, not just through their eyes. University of Wisconsin-Madison researchers said the light-emitting organ some squids use in camouflaging themselves to avoid being seen by predators also detects light. That, the scientists said, is a finding that might lead to insights into the mechanisms of controlling and perceiving light. Professor Margaret McFall-Ngai, who led the study, said the light organ, which...

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2009-03-26 15:42:50

Exquisitely sensitive microwave amplifier increases nano-scale measurement accuracy; could lead to quantum computing breakthroughs In the weird world of quantum mechanics, sub-atomic particles such as electrons and photons behave in strange ways that make no sense on the human scale. One of the counter-intuitive concepts of quantum mechanics is the uncertainty principle, which says that you can't pin a particle down. That means at any given moment, you can't know exactly both a particle's...


Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.