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Vacuum

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06.06.2022
15:43 AzoNano.com MXene Field Emission Properties Help to Inform Vacuum Electronic Devices

In an article recently published in the journal ACS Applied Electronic Materials, researchers synthesized two-dimensional (2D) transition metal carbides, nitrides, and/or carbonitrides (Ti3C2TX...

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11.05.2022
02:57 CosmosMagazine.com Roscosmos puts ISS between a rock and the vacuum of space

The International Space Station is in a precarious position. Not only is it orbiting in hard vacuum high above our heads. It now finds itself wedged between two opposing worlds. Last night, the head of Russia’s space agency Roscosmos told state-controlled television that he would officially withdraw from the international project. “The decision has been […]

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05.05.2022
16:07 CosmosMagazine.com Roscosmos puts ISS between a rock and the vacuum of space

The International Space Station is in a precarious position. Not only is it orbiting in hard vacuum high above our heads. It now finds itself wedged between two opposing worlds. Last night, the head of Russia’s space agency Roscosmos told state-controlled television that he would officially withdraw from the international project. “The decision has been […]

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22.01.2022
18:46 ScienceDaily.com Towards quantum simulation of false vacuum decay

By shaking an optical lattice potential, researchers have realized a discontinuous phase transition in a strongly correlated quantum gas, opening the door to quantum simulations of false vacuum decay in the early universe.

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20.01.2022
19:08 Phys.org Towards quantum simulation of false vacuum decay

Phase transitions are everywhere, ranging from water boiling to snowflakes melting, and from magnetic transitions in solids to cosmological phase transitions in the early universe. Particularly intriguing are quantum phase transitions that occur at temperatures close to absolute zero and are driven by quantum rather than thermal fluctuations.

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13.11.2021
15:11 LiveScience.com What would happen to the human body in the vacuum of space?

Here's what would happen to an astronaut's body if they didn't have a spacesuit protecting them in outer space.

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29.09.2021
09:59 Technology.org Scientists introduce theoretical method to produce light in a vacuum

A new theory suggests that light can escape vacuums. Researchers from Dartmouth College funded by the U.S. National Science Foundation have developed a theoretical

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31.08.2021
21:47 Optics.org University of Bonn scientists make laser beams visible in a vacuum

High-precision method simplifies ultra-precise adjustment for quantum optics experiments.

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25.08.2021
23:14 ScienceDaily.com Physicists make laser beams visible in vacuum

A beam of light can only be seen when it hits matter particles and is scattered or reflected by them. In a vacuum, however, it is invisible. Physicists have now developed a method that allows laser beams to be visualized even under these conditions. The method makes it easier to perform the ultra-precise laser alignment required to manipulate individual atoms.

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22:13 Phys.org Physicists make laser beams visible in vacuum

A new method developed at the University of Bonn simplifies ultra-precise adjustment for quantum optics experiments.

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29.07.2021
17:59 Phys.org Jupiter mission passes space vacuum test

ESA's Juice mission to Jupiter has successfully endured a month of space-like conditions inside the Large Space Simulator, the largest vacuum chamber in Europe.

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12.03.2021
16:13 AzoNano.com Scientists Create Borophane that Remains Stable Outside a Vacuum

Northwestern University researchers have, for the first time, created borophane -- atomically thin boron that is stable at standard temperatures and air pressures. Researchers have long been excited...

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17.12.2020
16:48 Phys.org Learning about quantum vacuum by studying atoms

The Unruh-effect connects quantum theory and relativity. Until now, it could not be measured. A new idea could change this.

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04.12.2020
13:26 Nanowerk.com Learning about quantum vacuum by studying atoms

The Unruh-effect connects quantum theory and relativity. Until now, it could not be measured. A new idea could change this - in a completely different way than ever before.

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23.11.2020
20:12 ScienceDaily.com Scientists make sound-waves from a quantum vacuum at the Black Hole laboratory

Researchers have developed a new theory for observing a quantum vacuum that could lead to new insights into the behaviour of black holes.

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18:31 Phys.org Scientists make sound-waves from a quantum vacuum at the Black Hole laboratory

Researchers have developed a new theory for observing a quantum vacuum that could lead to new insights into the behavior of black holes.

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19.09.2020
14:23 LiveScience.com Why is space a vacuum?

The nothingness of space is hard to wrap our heads around.

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10.08.2020
17:09 Phys.org Understanding vacuum fluctuations in space

An international research team from Germany and France has created structures in which light fields interact with electrons so strongly that the quantum vacuum itself is significantly altered. Using extremely short bursts of light, they interrupted this coupling much faster than the timescale of a vacuum fluctuation and observed an intriguing ringing of the emitted electromagnetic field, indicating the collapse of the vacuum state. Their key achievement could improve our understanding of the nature of nothingness—the vacuum of space itself, paving a way toward photonics exploiting vacuum fluctuations. The results are published in the current issue of Nature Photonics.

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13.12.2019
20:10 LiveScience.com Physicists Exploit the Bubbling Quantum Vacuum to Hopscotch Heat Across Empty Space

Heat isn't supposed to move like this.

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11.12.2019
21:49 NewScientist.Com Heat can quantum leap across a totally empty vacuum

Even a total vacuum is full of strange quantum fluctuations, which have now been caught making heat leap across empty space for the first time

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21:23 Nature.Com Phonon heat transfer across a vacuum through quantum fluctuations

Nature is the international weekly journal of science: a magazine style journal that publishes full-length research papers in all disciplines of science, as well as News and Views, reviews, news, features, commentaries, web focuses and more, covering all branches of science and how science impacts upon all aspects of society and life.

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21:09 ScientificAmerican.Com Space Heater: Scientists Find New Way to Transfer Energy Through a Vacuum

Nanoscale experiments reveal that quantum effects can transmit heat between objects separated by empty space -- Read more on ScientificAmerican.com

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08.12.2019
16:03 CosmosMagazine.com Unleash the quantum vacuum squeezer

New instrument extends LIGO’s already significant reach.

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02.10.2019
17:53 ScienceDaily.com Quantum vacuum: Less than zero energy

According to quantum physics, energy can be 'borrowed' -- at least for some time. Energies lower than zero are possible, much like a bank account that can be overdrawn. There are, however, certain restrictions to that. Scientists have now shown that these restrictions are very fundamental properties of our universe and must be true for various possible quantum theories.

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17:11 Phys.org Quantum vacuum: Less than zero energy

Energy is a quantity that must always be positive—at least that's what our intuition tells us. If every single particle is removed from a certain volume until there is nothing left that could possibly carry energy, then a limit has been reached. Or has it? Is it still possible to extract energy even from empty space?

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13:29 Nanowerk.com Quantum vacuum: Less than zero energy

An international research team has investigated the extent to which negative energy is possible.

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12.09.2019
16:40 Phys.org Study introduces new nanoscale vacuum channel transistors

Vacuum tubes initially played a central role in the development of electronic devices. A few decades ago, however, researchers started replacing them with semiconductor transistors, small electronic components that can be used both as amplifiers and switches.

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10.07.2019
23:16 ScienceDaily.com Could vacuum physics be revealed by laser-driven microbubble?

Scientists have discovered a novel mechanism which they refer to as microbubble implosion (MBI) in 2018. In this study, the group confirmed that during MBI, an ultrahigh electrostatic field close to the Schwinger field could be achieved because micron-sized bubbles embedded in a solid hydride target implode to have nanometer-sized diameters upon ionization.

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09.07.2019
17:02 Phys.org Could vacuum physics be revealed by laser-driven microbubbles?

A vacuum is generally thought to be nothing but empty space. But in fact, a vacuum is filled with virtual particle-antiparticle pairs of electrons and positrons that are continuously created and annihilated in unimaginably short time-scales.

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30.05.2019
19:04 Phys.org James Webb Space Telescope emerges successfully from final thermal vacuum test

NASA's James Webb Space Telescope has successfully cleared another critical testing milestone, taking this ambitious observatory one step closer to its 2021 launch. The spacecraft has gone through its final thermal vacuum test meant to ensure that its hardware will function electronically in the vacuum of space, and withstand the extreme temperature variations it will encounter on its mission.

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10.04.2019
20:24 Nature.Com Electric field correlation measurements on the electromagnetic vacuum state

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20:24 Nature.Com Podcast: Heart failure and vacuum field fluctuations

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20:24 Nature.Com Correlations detected in a quantum vacuum

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29.03.2019
20:45 ScienceMag.org Physicists predict a way to squeeze light from the vacuum of empty space

Experiment could test theory of quantum electrodynamics—if it ever can be done

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26.03.2019
19:32 ScienceDaily.com Listening to the quantum vacuum

Since the historic finding of gravitational waves from two black holes colliding over a billion light years away was made in 2015, physicists are advancing knowledge about the limits on the precision of the measurements that will help improve the next generation of tools and technology used by gravitational wave scientists. Physicists have now measured quantum ''back action'' in the audio band at room temperature.

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01:41 Nanowerk.com Listening to the quantum vacuum

Researchers present the first broadband, off-resonance measurement of quantum radiation pressure noise in the audio band, at frequencies relevant to gravitational wave detectors.

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05.03.2019
02:03 Nanowerk.com The force is with us, always? Tuning quantum vacuum forces from attractive to repulsive

A physicist has shown for the first time that the Casimir force can be reversed and made repulsive, tunable or enhanced, based on the material inserted in between the plates.

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01:03 ScienceDaily.com The force is with us, always? Tuning quantum vacuum forces from attractive to repulsive

Scientists can put two uncharged metal plates close together in a vacuum, and 'voila!' -- they will attract each other. In 1948, Dutch theoretical physicist Hendrick Casimir first predicted an attractive force responsible for this effect. Scientists have wondered, can there be an equal yet opposite kind of Casimir force? Physicists have shown for the first time that the Casimir force can be reversed and made repulsive, tunable or enhanced, based on the material inserted in between the plates.

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00:24 Phys.org The force is with us, always? Tuning quantum vacuum forces from attractive to repulsive

The force is strong not only in Star Wars lore but also as a fundamental property in physics. For example, scientists can put two uncharged metal plates close together in a vacuum, and "voila!" —-they will attract each other like Luke Skywalker and his trusted lightsaber.

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17.05.2018
15:49 Phys.org Researchers are creating a spot colder than the vacuum of space inside the International Space Station

In 2018, a new atomic refrigerator will blast off for the space station. It's called the Cold Atom Lab (CAL), and it can refrigerate matter to one ten billionth of a degree above absolute zero, just above the point where all the thermal activity of atoms theoretically stops.

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07.05.2018
14:03 Phys.org Specialists in mechanics investigated the behavior of vacuum oil in space

A research team from the Research Institute of Mechanics, MSU together with a colleague from the Center of New Space Technologies, MAI described the behavior of a liquid sheet propagating in open space. The results of the study were published in the Physics of Fluids journal.

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29.01.2018
18:11 Yahoo Science Particle Physics: New Laser Could Rip Apart Space Vacuum And Convert Light Into Matter

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06.12.2017
12:05 Yahoo Science ‘Return home’ feature will keep astronauts from dying in the vacuum of space

There are plenty of ways to brutally die in the unforgiving vacuum of space. Fortunately, a company has patented a next-generation spacesuit with a return home feature fail-safe, to boot.

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05.12.2017
02:52 Space.com NASA's James Webb Space Telescope Emerges from Giant Vacuum Chamber

Part of NASA's next major observatory – the James Webb Space Telescope – just left a thermal vacuum chamber after about 100 days of cryogenic testing to prepare it for launch in 2019.

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18.09.2017
14:16 ScienceNews.org A new test of water ripples supports the idea of quantum heat in a vacuum

Water waves bolster theory that accelerating space travelers really feel the heat.

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17.08.2017
14:20 Phys.org Image: Europe's largest vacuum chamber, the Large Space Simulator

An external view of Europe's largest vacuum chamber, the Large Space Simulator, which subjects entire satellites to space-like conditions ahead of launch. This 15 m-high and 10 m-diameter chamber is cavernous enough to accommodate an upended double decker bus.

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26.07.2017
23:44 Yahoo Science 3D-Printed Tools Will Soon Brave the Vacuum of Space

Thanks to a new kind of plastic, printed tools no longer need to stay inside.

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05.06.2017
19:18 ScienceDaily.com 'Quantum leap' toward building a novel experiment to probe the 'dark contents' of the vacuum

Physicists have made a huge step forwards towards building a novel experiment to probe the 'dark contents' of the vacuum. What we see, normal matter and light, only accounts for a about 5 percent of the universe. Understanding the remaining 95 percent (the dark content) remains of the greatest challenges for fundamental physics in the 21st Century.

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01.06.2017
19:31 Space.com James Webb Space Telescope to Undergo Testing in Apollo Vacuum Chamber

The scientific successor to NASA's Hubble Space Telescope has arrived in Houston for a pre-launch milestone trial using an historic and unparalleled facility that was built for the Apollo spacecraft.

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18.05.2017
18:44 PhysicsWorld.com Flash Physics: Sandra Faber wins Gruber prize, transforming magnetic monopoles, vacuum scattering revealed

Today's selection of need-to-know updates from the world of physics

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17.05.2017
19:51 Physics.Aps.org Synopsis: Scattering from the Quantum Vacuum  

Polarized gamma rays could be used to measure how gamma-ray photons scatter off the virtual particles that make up the quantum vacuum. [Physics] Published Wed May 17, 2017

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20.02.2017
17:33 Phys.org Friction in the vacuum?

(Phys.org)—When three physicists first discovered through their calculations that a decaying atom moving through the vacuum experiences a friction-like force, they were highly suspicious. The results seemed to go against the laws of physics: The vacuum, by definition, is completely empty space and does not exert friction on objects within it. Further, if true, the results would contradict the principle of relativity, since they would imply that observers in two different reference frames would see the atom moving at different speeds (most observers would see the atom slow down due to friction, but an observer moving with the atom would not).

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18.01.2017
21:08 Phys.org Studying the quantum vacuum: Traffic jam in empty space

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by Professor Alfred Leitenstorfer has now shown how to manipulate the electric vacuum field and thus generate deviations from the ground state of empty space which can only be understood in the context of the quantum theory of light.

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22.12.2016
23:53 ScienceDaily.com The sound of quantum vacuum

Quantum mechanics dictates sensitivity limits in the measurements of displacement, velocity and acceleration. A recent experiment probes these limits, analyzing how quantum fluctuations set a sensor membrane into motion in the process of a measurement. The membrane is an accurate model for future ultraprecise quantum sensors, whose complex nature may even hold the key to overcome fundamental quantum limits.

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18:42 Nanowerk.com The sound of quantum vacuum

Quantum membranes for ultraprecise mechanical measurements.

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