Superfluid

Superfluid is a state of matter in which the matter behaves like a fluid with zero viscosity and zero entropy. The substance, which looks like a normal liquid, will flow without friction past any surface, which allows it to continue to circulate over obstructions and through pores in containers which hold it, subject only to its own inertia.

Known as a major facet in the study of quantum hydrodynamics and macroscopic quantum phenomena, the superfluidity effect was discovered by Pyotr Kapitsa and John F. Allen, and Don Misener in 1937. It has since been described through phenomenological and microscopic theories. The formation of the superfluid is known to be related to the formation of a Bose-Einstein condensate. This is made obvious by the fact that superfluidity occurs in liquid helium-4 at far higher temperatures than it does in helium-3. Each molecule of helium-4 is a boson particle, by virtue of its zero spin. Helium-3, however, is a fermion particle, which can form bosons only by pairing with itself at much lower temperatures, in a process similar to the electron pairing in superconductivity.

Los Angeles Jury Sentences Suspect Known As 'Grim Sleeper' Killer To Death

Edit WorldNews.com 06 Jun 2016

Family members of the victims cried as the verdicts on punishment were read. In the much-watched case, a prosecutor had asked jurors to show Franklin the same compassion he showed his victims and give him the "ultimate penalty." ... 10.Franklin said, "Yes, your honor," in regards to the date but otherwise sat quietly and stared straight ahead the entire time ... Most of the slayings fit a similar pattern ... – WN.com, Jack Durschlag....

photo: UN / Evan Schneider

File - Ibrahim Dabbashi, Permanent Representative of Libya to the UN, addresses the Security Council meeting on the situation in his country, 11 December, 2015.

Libyan Government Forces Take Air Base Back From Islamic State

Edit WorldNews.com 06 Jun 2016

The UN-backed unity government in Libya continues to make significant strides recapturing Islamic State territory with one of the biggest captures taking place on Saturday of a military base near the city of Sirte, Al Jazeera reported Monday.Government forces captured Gardabiya Air Base as part of an ongoing military campaign to drive the armed group out of its Sirte stronghold, the report said....

photo: Creative Commons / Brocken Inaglory

File - A great white shark at Isla Guadalupe, Mexico. The great white is one of a few sharks known to have fatally attacked humans.

Woman dies in second fatal Australian shark attack in a week

Edit CNN 06 Jun 2016

(CNN)A female diver died in an apparent shark attack off Australia's west coast on Sunday, making it the second fatal shark attack recorded in the area in less than a week. The woman was underwater with her 43-year-old dive partner at a popular spot called Mindarie, about 35 kilometers (21 miles) north of Perth, when she was attacked, according to police ... Read. How to survive a shark attack. 'Commotion in the water'. Read More ... Replay ... ....

photo: AP / militant photo via AP

This undated image released by a militant website, which has been verified and is consistent with other AP reporting, shows members of the Islamic State group as they prepare to kill men who were allegedly spying for the U.S.-led coalition in the province of Salah al-Din, Iraq. The U.S. -led coalition has been targeting top IS officials. Over the past months, American officials have said that the U.S. has killed a string of top commanders from the group, including its "minister of war" Omar al-Shishani, feared Iraqi militant Shaker Wuhayeb, also known as Abu Wahib. The Arabic caption on the photo reads, "the detention of a spying cell by the special security force."

In hunt for spies, Islamic State kills dozens of its own in Syria

Edit Indian Express 06 Jun 2016

The Islamic state is killing many of its own in Syria in order to hunt for spies involved in the death of a senior commander, Abu Hayjaa al-Tunsi. (Source. AP). In March, a senior commander with the Islamic State group was driving through northern Syria on orders to lead militants in the fighting there when a drone blasted his vehicle to oblivion ... Share This Article. Related Article ... 6, slideMargin. 3 }); }); ... ....

photo: AP / Sandy Huffaker

Democratic presidential candidate Sen. Bernie Sanders, I-Vt. speaks during a campaign rally at Qualcomm Stadium on Sunday, May 5, 2016 in San Diego.

CNN accused of media bias against Bernie Sanders after focusing too much on super delegates

Edit The Independent 06 Jun 2016

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Physicists Link Topological Defects to Unusual Behavior in Ferroelectrics (University of Arkansas)

Edit Public Technologies 03 Jun 2016

(Source. University of Arkansas) Photo by University Relations. Yousra Nahas. FAYETTEVILLE, Ark. - New University of Arkansas theoretical physics research shows that topological defects can explain unusual features of some ferroelectric materials ... For example, she said, they have been the key to understanding properties such as those in superfluids, in which the matter behaves like a fluid with zero viscosity ... The U.S ... (noodl. 33928947) ....

Mikael Fogelström new head at MC2 (Chalmers tekniska högskola)

Edit Public Technologies 27 May 2016

(Source. Chalmers tekniska högskola). Mikael Fogelström, professor of theoretical physics and head of the Applied Quantum Physics Laboratory, is new head at the Department of Microtechnology and Nanoscience - MC2 - from 1 July 2016. 'I think it will be a very interesting job, there are many challenges to tackle,' he says in a first comment ... The topic for his thesis was theoretical and numerical studies of superfluid 3He ... Text and photo....

Hunting for Dark Matter’s ‘Hidden Valley’ (Lawrence Berkeley National Laboratory)

Edit Public Technologies 24 May 2016

On an afternoon in late April, Zurek and her student Katelin Schutz sat together waiting to press the button to submit a new paper on a proposal to tease out a signal for light dark matter particles using an exotic, supercooled liquid known as superfluid helium ... They are also working with Dan McKinsey, a Berkeley Lab scientist and UC Berkeley physics professor who is a superfluid helium expert, on possible designs for an experiment....

New device steps toward isolating single electrons for quantum computing (Argonne National Laboratory)

Edit Public Technologies 20 May 2016

(Source. Argonne National Laboratory). This press release was originally published by UChicagoNews ... Electrons represent an ideal quantum bit, with a 'spin' that when pointing up can represent a 0 and down can represent a 1 ... At the beginning of the experiment, the team first floods the sample with superfluid helium ... As the bulb heats up, electrons 'boil' off and fly onto the surface of the cold superfluid helium ... 'But we're pretty close.'....

Lewis Carroll's strange legacy!

Edit The Times of India 15 May 2016

Poets can count themselves fortunate even if snatches of their works linger on in memory down the years but this poem is unique for it not only influenced popular literature or musicals, opera, theatre, music, including jazz but also figures in physics (a superfluidity phenomenon), mathematics (graph theory), law (a ruling by the US Court of ......

Chillin' with lasers: Using laser light to cool a quantum liquid (The University of Queensland)

Edit Public Technologies 05 Apr 2016

Australian researchers from The University of Queensland have, for the first time, used laser light to cool a special form of quantum liquid, called a superfluid ... Superfluids are quantum liquids with a strange property - much like electrical currents in superconductors, the flow of a superfluid never stops ... In the experiments, the team created a superfluid helium film on a silicon chip....

‘The Big Bang Theory’ Season 9 Remaining Episodes May Feature Penny Deciding on a New Career

Edit Master Herald 19 Mar 2016

Season 9 of the long-running sitcom on CBS, “The Big Bang Theory” is on a three-week hiatus to give way for the NCAA championships on the network and its episode 19 will air on the network on March 31 ... She has been working with Bernadette since the Season 8 of “The Big Bang Theory” and it seems that it is going to change soon ... In the past episode, Leonard and Howard work towards getting their superfluid helium idea patented ... ....

Exploring some of Princeton's hottest and coolest spots (Princeton University)

Edit Public Technologies 04 Mar 2016

(Source. Princeton University). Princeton's campus is a varied place, and one of the ways that's apparent is in examining the hottest and coolest happenings on campus ... Posted March 3, 2016; 12.00 p.m. by the Office of Communications ... Said Souza ... Cold ... That's colder than interstellar space! In the Bakr lab, we cool lithium atoms down to even colder temperatures to study quantum properties of matter, such as superfluidity ... Hot ... Cold ... Hot ... Cold....

University of Toronto physicists discover new laws governing the “developmental biology of materials” (University of ...

Edit Public Technologies 22 Feb 2016

'Just as a stem cell can become a fingernail or a heart cell depending on its context, ultracold atoms can become metals, insulators, superfluids or other types of materials.' ... P-waves, for instance, correlate with unusual forms of superconductivity and superfluidity, in which particles flow without resistance....

How to Build a Quantum Computer (University of Vermont)

Edit Public Technologies 10 Feb 2016

(Source. University of Vermont). Adrian Del Maestro wants to kill fluffy bunnies ... Speed limit ... At this low temperature the atoms form a strange puddle called a 'superfluid' where the puddle is really a pile of entangled atoms all sharing a superposition ... how much entanglement can be extracted from a superfluid-the wildly complex fuel of a quantum computer-and transferred to a more-orderly register of qubits, say a lattice of electrons?....

Physicist studies concepts affecting fluids at different scales (The University of Chicago)

Edit Public Technologies 08 Feb 2016

(Source. The University of Chicago). On the wall of Prof. Paul Wiegmann's office hang two large, artistically rendered photographs of fluid vortices. One shows one big vortex, while the other depicts many vortices moving collectively. A Chicago modern artist gave the photographs to Wiegmann after learning of his scientific interest in vortices ... electronic fluids, superfluid helium and even ordinary water ... Remarkable collectivity ... (noodl....

Researchers have achieved the next breakthrough in quantum physics

Edit Business Insider 22 Jan 2016

These knots aren't quite the same as the ones you might tie to moor a boat to a jetty — they've been made in a superfluid form of quantum matter called Bose-Einstein Condensate, or BEC, and are more like smoke rings than traditional knots ... When the BEC superfluid is first created, it's made up of a series of points in space all having a specific orientation ... "Thus far, we have tied several hundred such knots." ... Copyright 2016 ... ....

Slashdot Physicists Create 'Quantum Knots'

Edit Slashdot 20 Jan 2016

Then we exposed the superfluid to a rapid change of a specifically tailored magnetic field, which tied the knot in less than a thousandth of a second."...