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Mar 21, 2020

One-kilometer breakthrough made in quantum field

Posted by in categories: innovation, quantum physics

A team led by Prof. Guo Guangcan from University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) and collaborators first realized distribution of high-dimensional orbital angular momentum entanglement over a 1 km few-mode fiber. The result is published in Optica.

Increasing the channel capacity and tolerance to noise in is a strong practical motivation for encoding quantum information in multilevel systems, qudits as opposed to qubits. From a foundational perspective, entanglement in higher dimensions exhibits more complex structures and stronger non-classical correlations. High-dimensional entanglement has demonstrated its potential for increasing channel capacity and resistance to noise in processing. Despite these benefits, the distribution of high-dimensional entanglement is relatively new and remains challenging.

The orbital angular momentum of photon is a high dimensional system which has been paid much attention to in recent years. However, orbital angular momentum entanglement is susceptible to atmospheric turbulence or mode crosstalk and mode dispersion in optical fibers. It can only transmit a few meters, and is limited to two-dimensional entanglement distribution.

Mar 21, 2020

Going stir crazy? Then train like an astronaut, mimic space

Posted by in categories: space, transportation

Isolated at home? Then train like an astronaut.

That’s the inspirational advice from a public engagement specialist at NASA’s Jet Propulsion Laboratory in Pasadena, California.

Astronaut wannabe Rachel Zimmerman-Brachman said Friday that isolation is a lot like astronaut training. So she came up with this and launched it via Facebook on Thursday:

Mar 21, 2020

A Military-Funded Biosensor Could Be the Future of Pandemic Detection

Posted by in categories: biotech/medical, military

If it wins FDA approval next year, the two-part sensor could help spot new infections weeks before symptoms begin to show.

Why are pandemics so hard to stop? Often it’s because the disease moves faster than people can be tested for it. The Defense Department is helping to fund a new study to determine whether an under-the-skin biosensor can help trackers keep up — by detecting flu-like infections even before their symptoms begin to show. Its maker, Profusa, says the sensor is on track to try for FDA approval by early next year.

The sensor has two parts. One is a 3mm string of hydrogel, a material whose network of polymer chains is used in some contact lenses and other implants. Inserted under the skin with a syringe, the string includes a specially engineered molecule that sends a fluorescent signal outside of the body when the body begins to fight an infection. The other part is an electronic component attached to the skin. It sends light through the skin, detects the fluorescent signal and generates another signal that the wearer can send to a doctor, website, etc. It’s like a blood lab on the skin that can pick up the body’s response to illness before the presence of other symptoms, like coughing.

Mar 21, 2020

Whale experts launch free, virtual marine biology camp to entertain and inform kids

Posted by in categories: biotech/medical, education

The scientists running Seattle-based Oceans Initiative more typically apply their marine mammal expertise to research on endangered orcas or conservation of white-sided dolphins in Washington’s Puget Sound.

But the upside-down world of the new coronavirus and the closure of their nearly 6-year-old daughter’s school inspired them this week to launch what they’ve dubbed their Virtual Marine Biology Camp.

“We thought maybe it would be fun for a group of us to be able to hang out online and talk about whales and dolphins and other marine life,” said Erin Ashe, executive director and scientist with the nonprofit institute.

Mar 21, 2020

China gets a glimpse of life on the other side of coronavirus

Posted by in category: biotech/medical

Restrictions are being eased across China as the number of new infections recorded drops sharply.

Mar 21, 2020

Stem Cell Therapy Successful in 7 COVID-19 Cases

Posted by in category: biotech/medical

A study published in Aging and Disease shows the effectiveness of mesenchymal stem cell (MSC) therapy against a deadly immune reaction caused by COVID-19.

While scientists all over the world are working on a vaccine that would be effective against the SARS-CoV-2 coronavirus, which is responsible for the COVID-19 pandemic, a group of researchers from China and other countries has been exploring a therapeutic approach. Capitalizing on previous research, this group has conducted a successful trial of MSC therapy, resulting in the recovery of all seven patients [1]. These important results inspire hope, considering that a vaccine may still be more than a year away.

Mar 21, 2020

Putin’s Secret Intelligence Agency Hacked: Dangerous New ‘Cyber Weapons’ Now Exposed

Posted by in category: cybercrime/malcode


The successor agency to Russia’s KGB has been hacked again—and the exposed tools represent a threat to us all.

Mar 21, 2020

L.A. County gives up on containing coronavirus, tells doctors to skip testing of some patients

Posted by in categories: biotech/medical, health

The decision by the L.A. County public health system not to test patients with coronavirus symptoms could make it difficult to know how many people are infected.

Mar 21, 2020

DOJ seeks new emergency powers amid coronavirus pandemic

Posted by in categories: biotech/medical, government

“The Justice Department has quietly asked Congress for the ability to ask chief judges to detain people indefinitely without trial during emergencies — part of a push for new powers that comes as the coronavirus spreads through the United States.”


One of the requests to Congress would allow the department to petition a judge to indefinitely detain someone during an emergency.

Mar 21, 2020

Tiny double accelerator recycles energy

Posted by in categories: materials, particle physics

A team of DESY scientists has built a miniature double particle accelerator that can recycle some of the laser energy fed into the system to boost the energy of the accelerated electrons a second time. The device uses narrowband terahertz radiation which lies between infrared and radio frequencies in the electromagnetic spectrum, and a single accelerating tube is just 1.5 centimetres long and 0.79 millimetres in diameter. Dongfang Zhang and his colleagues from the Center for Free-Electron laser Science (CFEL) at DESY present their experimental accelerator in the journal Physical Review X.

The miniature size of the device is possible due to the short wavelength of radiation. “Terahertz-based accelerators have emerged as promising candidates for next-generation compact electron sources,” explains Franz Kärtner, Lead Scientist at DESY and head of the CFEL group that built the device. Scientists have successfully experimented with terahertz accelerators before, which could enable applications where large particle accelerators are just not feasible or necessary. “However, the technique is still in an early stage, and the performance of experimental terahertz accelerators has been limited by the relatively short section of interaction between the and the electrons,” says Kärtner.

For the new device, the team used a longer comprising many cycles of terahertz waves. This multicycle pulse significantly extends the interaction section with the particles. “We feed the multicycle terahertz pulse into a waveguide that is lined with a dielectric material”, says Zhang. Within the waveguide, the pulse’s speed is reduced. A bunch of electrons is shot into the central part of the waveguide just in time to travel along with the pulse. “This scheme increases the interaction region between the terahertz pulse and the electron bunch to the centimetre range—compared to a few millimetres in earlier experiments,” reports Zhang.