| Particle physics (18) |  |
| Spin (404) | |
| Strong interaction (12) | |
| Weak interaction (5) | |
| Particle physics (18) | |
| Spin (404) | |
| Strong interaction (12) | |
| Weak interaction (5) | |
Spin-offsthe new class of NYC tech leaders aren't pure cold-blooded capitalists. They have strong, diverse missions.
The new method spins the drug into silklike fibers that quickly dissolve when in contact with moisture, releasing higher doses of the drug than possible with other topical materials such as gels or creams
which carried information in the form of their spin and in their path. The experiment showed that the information contained in three qubits could be compressed into only two qubits
but gave the process a spin with a different preparation so now we re the first to make neat fibers of pure carbon nanotube electrolytes.
and may apply equally to other one-dimensional chains subject to Peierls distortions including conducting polymers and charge/spin density-wave materials.
Applications for these new particle accelerators would go well beyond particle physics research. Byer says laser accelerators could drive compact X-ray free-electron lasers comparable to SLAC s Linac Coherent light Source that are all-purpose tools for a wide range of research.
#Earth s inner core spins faster than rest of planet University of Leeds rightoriginal Studyposted by Ben Jones-U. Leeds on September 17 2013the Earth s
while the outer core comprising mainly molten iron spins westwards at a slower pace. Although Edmund Halley who also discovered the famous comet showed the westward-drifting motion of the Earth s geomagnetic field in 1692 it is the first time that scientists have been able to link the way the inner core spins to the behavior of the outer core.
The planet behaves in this way because it is responding to the Earth s geomagnetic field.
ever since the first Lunar rover went for a spin during the Apollo 15 mission in 1971.
Devices that manipulate the spin of individual electrons are the closest possible candidate but they re less mature,
the amount of sunlight that hits it varies greatly as the geosynchronous satellite and Earth spin.
For instance if you change the spin of one the spin of the other will also be altered.
and allowing the scientists to accurately establish their spin or value. If they can repeat the experiment over distances significantly larger than 10 feet it could mean that incomprehensibly fast quantum computers
The trick to improving the accuracy of the technology was to select for specific silicon isotopes that have no magnetic spin,
because magnetic spin can mess with the phosphorous atoms that the qubits are made of.""In natural silicon each atom also has its own spin
which affects the phosphorous atom, which is why the accuracy was only 50 per cent,
"We solved the problem by removing all the silicon 29 isotopes that have magnetic spin leaving only silicon 28,
which has no magnetic spin to influence the phosphorous, giving us an accuracy of 99.99 per cent."
or hard drives reliant on electrons'intrinsic spin are getting packed into smaller and smaller spaces. The limit was thought to be set:
not to mention other quantum effects, such as spin, the quantum analogue of magnetic moment. The oscillations are defined well,
Antiparticles have the same mass as their ordinary particle counterparts but carry an opposite charge and spin.
Huge machines at particle physics labs such as CERN near Geneva Switzerland have been churning out antimatter for over a decade.
The researchers have dubbed the system easurable virtual reality (MVR) a spin on conventional virtual reality that designed to visualize a robot erceptions and understanding of the world
Those crystals interfere with the normal magnetic spins of hydrogen atoms. When exposed to a powerful magnetic field hydrogen atoms align their spins in the same direction.
When a second smaller field perturbs the atoms they should all change their spins in synchrony
but if another magnetic particle such as hemozoin is present this synchrony is disrupted through a process called relaxation.
and weak interaction with the rest of the environment including nonmetallic materials and humans. In fact they demonstrated that they could light the bulb at roughly 45 percent efficiency with all six researchers standing in between the two coils.
which alters the proton spins inside the silicone a phenomenon that can be detected with MRI.
Think of a cordless drill that spins to pull a rope instead of driving a drill bit. As the spindle rotates,
At first, the vortices are separate swirls that spin in opposite directions, mixing the oil and SCW together.
The finding has the potential to increase graphene's use in computers as in computer chips that use electronic spin to store data.
For instance, nanotube resonators might be used to detect individual nuclear spins, which would be an important step towards magnetic resonance imaging (MRI) with a spatial resolution at the atomic level.
Spintronics devices unlike conventional electronics use electrons'spins rather than their charge. But this top-down fabrication approach is not yet practical
This has become possible by employing a remarkable physical effect the spin-orbit coupling of light.
because light has an intrinsic angular momentum, the spin. Similar to a pendulum which can swing in one particular plane
Its rotational axis corresponding to the spin points into the direction of propagation. But light moving through ultra-thin glass fibres has very special properties.
"Then, the direction of propagation is perpendicular to the spin, just like a bicycle, moving into a direction
The effect is called"spin-orbit-coupling of light"."Coupling Rotation and the Direction of Motion
Researchers are therefore searching for ways to harness other properties of electrons such as the'spin'of an electron as data carriers in the hope that this will lead to devices that consume less power.
Iwasa and his co-workers combined theoretical calculations with an experimental spin -and angle-resolved photoelectron spectroscopy technique to identify such valleys in the band structure of an ultrathin layer of molybdenum disulfide just a few atoms thick.
Instead the atoms in each molybdenum disulfide layer in the films created by Iwasa's team were shifted slightly from those in the two-dimensional level beneath (Fig. 1). This breaking of the film's symmetry meant that the researchers were also able to harness the spin of electrons.
and spin degrees of freedom says Iwasa. The researchers hope to demonstrate valleytronics prototypes based on molybdenum disulfide
Though previous studies had shown a strong interaction between pentacene and metal surfaces we found that the zigzag-shaped picene basically just sits on the silver said University of Tokyo researcher Yukio Hasegawa.
The weak interaction is advantageous for molecular electronics applications because the modification of the properties of molecular thin film by the presence of the silver is negligible
According to Hasegawa picene's weak interactions with the silver allow it to deposit directly on the surface without a stabilizing layer of molecules between a quality he said is essential for achieving high-quality contact with metal electrodes.
To create the thin film the researchers spin coated graphene oxide solution to a glass surface.
As the Airborne wind turbine makes giant vertical loops air spins four rotors which drive generators. A tether sends the power to a ground station.
In recent years a number of labs have created genetically engineered silkworms that spin part-spider silk.
While this solves the physics of the problem another challenge that comes with cheap vibration motors is that they are well cheap and all spin at different frequencies with different weights and even different directions.
which spins and entraps the bead in the center of a tornadolike flurry, rotates the bead on its own axis. Lastly,
but to add strong interactions between ultracold atoms, or to incorporate different quantum states, or spins.
Ketterle says such experiments would connect the research to important frontiers in material research, including quantum Hall physics
and therefore the Higgs mechanism of generating the mass of fundamental particles is possible.""There is much more to be learned during Run 2 of the world's most powerful particle accelerator."
"I think that in the LHC Run 2 we will sieve through more data than in all particle physics experiments in the world together for the past 50 years,
so that the particle physicists working on the experiments, who prize stability, will be satisfied with the quality of the beam conditions being delivered to them,
particle physics and material science. Terahertz radiation falls between the microwave and infrared portions of the electromagnetic spectrum (300 GHZ THZ),
but to add strong interactions between ultracold atoms, or to incorporate different quantum states, or spins.
Ketterle says such experiments would connect the research to important frontiers in material research, including quantum Hall physics
ripples in the fabric of space-time. ee been thinking a lot about using these methods to detect gravitational waves from pulsarsncredibly dense stars that are the mass of our sun compressed into a 10 km radius and spin at 10 to 100 times a second,
There a large surface area with weak interactions for which we have failed typically to find good drugs, he said.
the UCLA team measured the volume of cerebral arteries twice using a technique called Arterial Spin Labeling,
In a quantum computer, data is encoded in the'spin, 'or magnetic orientation, of individual electrons. Not only can they be in one of two'up'or'down'spin states,
but also a superposition of both up and down. The key step taken by the Australian scientists was to reconfigure traditional transistors
'We then store the binary code of 0 or 1 on the'spin'of the electron,
'In particle physics, every force is mediated by a special kind of force particle, and the force particle of the strong nuclear force is said the gluon
A confirmation of its existence would also once demonstrate that higher dimensional gravity research can be used to solve particle physics problems.
which can cause the brain to spin inside the skull and lead to brain injuries. Bob Weber, cofounder of 6d helmets, said the combination of the suspension system
This finding is likely to spawn new developments in emerging technologies such as low-power electronics based on the spin of electrons or ultrafast quantum computers.
"The electrons in topological insulators have unique quantum properties that many scientists believe will be useful for developing spin-based electronics and quantum computers.
Differently from light waves, the spin of the electrons also causes them to behave as tiny magnets.
and the electronic wave in the resonator happens through the spin.""In the future, this spin-coherent coupling could make it possible to connect quantum dots over large distances,
"says Zilberberg, who has developed a theoretical model for Rössler's experiment in the group of ETH professor Gianni Blatter.
These nitrogen vacancy centers possess unique properties such as optical initialization and detection of its spin states, stable and strong fluorescence even from a single center
and long spin coherence time at room temperature. These properties make nitrogen vacancy centers in diamonds candidates for next-generation spin-based quantum devices such as magnetometers, quantum computers,
"The electrons in topological insulators have unique quantum properties that many scientists believe will be useful for developing spin-based electronics and quantum computers.
ripples in the fabric of space-time. ee been thinking a lot about using these methods to detect gravitational waves from pulsarsncredibly dense stars that are the mass of our sun compressed into a 10 km radius and spin at 10 to 100 times a second,
In addition to charge, electrons also have a degree of freedom known as spin. When spins line up parallel to each other (in a crystal, for example
they form a ferromagnethe type of magnet you might use on your refrigerator and that is used in the strip on your credit card.
Because spin has both a magnitude and a direction, a spin-ordered phase is described by a vector.
Over the last several decades, physicists have developed sophisticated techniques to look for both of these types of phases.
The spin of the electron sets a code of 0 or 1, and an external current and microwave field control the qubits
"In our case, the target qubit flips its spin if the control qubit is pointing down.
The spin of the electron sets a code of 0 or 1, and an external current and microwave field control the qubits
"In our case, the target qubit flips its spin if the control qubit is pointing down.
In particle physics, a very important question is whether all the laws of physics display a specific kind of symmetry known as CPT,
The device is a centrifuge that spins a few microliters of a urine sample. On the periphery of the spinning disk are microchannels leading to tiny vessels called-cup capture unitsthat collect individual bacteria.
#Flicking the switch on spin-driven devices Compressing magnetically and electrically active crystals in one direction unlocks exotic spintronic switching activityby breaking the symmetry of ultiferroiccrystals using a special compression cell,
a team of RIKEN scientists has discovered a simple way to activate the material spin-based polarization.
Recently, researchers have taken an interest in spin-driven ferroelectricity where polarization effects are initiated at ultralow temperatures by changing the crystal internal symmetry.
electron spins can be aligned to generate ferroelectric polarization. Most pressure cells, however, apply stress in all directions equally. he biggest challenge we faced was accurately controlling uniaxial stress at temperatures as low as 3 kelvin,
In typical spin-driven ferroelectric experiments, the magnetic field causes polarization to rise to a single value when the temperature approaches absolute zero.
because they show we can control the spin-driven ferroelectricity in this compound by applying uniaxial stress at the low megapascal level,
the researchers anticipate that a variety of spin-driven ferroelectric behaviors will emerge in the future, particularly for crystals with high levels of symmetry. any multiferroic materials have the potential to show stress-induced effects,
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th, 2015new Method to Produce Dual Zinc oxide Nanorings May 11th
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th, 2015new Method to Produce Dual Zinc oxide Nanorings May 11th
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th, 2015new Method to Produce Dual Zinc oxide Nanorings May 11th
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th, 2015new Method to Produce Dual Zinc oxide Nanorings May 11th
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th,
#First realization of an electric circuit with a magnetic insulator using spin waves In our current electronic equipment,
In a magnetic insulator, a spin wave is used instead. Spin is a magnetic property of an electron.
A spin wave is caused by a perturbation of the local magnetisation direction in a magnetic material.
Such a perturbation is caused by an electron with an opposite spin, relative to the magnetisation.
Spin waves transmit these perturbations in the material. This research demonstrates for the first time that it is possible to transmit electric signals in an insulating material.
electrical circuits based on spin waves have not been realised, since it turned out to be impossible to introduce a perturbation in the system large enough to create spin waves.
FOM workgroup leader prof. dr. Bart van Wees and his Phd student Ludo Cornelissen, both from the University of Groningen and FOM workgroup leader dr. Rembert
Duine from Utrecht University have succeeded to use spin waves in an electric circuit by carefully designing the device geometry.
This allows them to make use of the spin waves that are already present in the material due to thermal fluctuations
and hence enables the spin waves to be used in an electric circuit. The spin wave circuit that the researchers built,
consists of a 200 nanometre thin layer of yttrium iron garnet (a mineral and magnetic insulator, YIG in short), with a conducting platinum strip on top of that on both sides.
this influences the magnetisation at the YIG surface and the electron spin is transferred. This causes a local magnetisation direction
generating a spin wave in the YIG. Spin wave detection The spin waves that the researchers send into the YIG are detected by the platinum strip on the other side of the YIG.
The detection process is exactly opposite to the spin wave injection: a spin wave collides at the interface between YIG and platinum,
and transfers its spin to an electron in the platinum. This influences the motion of the electron, resulting in an electric current that the researchers can measure.
The researchers already studied the combination of platinum and YIG in previous research. From this research it was found that
when spin is transferred from platinum to YIG, this also implies the transfer of heat across the interface.
This enables the heating or cooling of the platinum-YIG interface, depending on the relative orientation of the electron spins in the platinum and the magnetisation in the YIG G
#Researchers develop'instruction manual'for futuristic metallic glass: Research paves the way for alloys that are 3x stronger than steel yet bend like gum Abstract:
and magnetization in order to understand how to control electron spins (electron magnetic moments) and to create the new generation of electronics.
In spin electronics-or spintronics-information is coded via the electron spin, which could be directed along
that the spins of the electron and of other charged particles are very difficult to control.
and ferromagnetics may be used to control spins. Superconducting state is very responsive sensitive to magnetic fields: strong magnetic fields destroy it,
in magnetic layers storages the magnetic field tends to arrange spins in one direction, and the Cooper pair (BCS pair) in ordinary superconductors haves opposite spins."
"My colleagues experimented with devices called superconducting spin-valves. They look like a"sandwich, "made of nanolayers of ferromagnetic material, superconductor and other metals.
By changing the direction of magnetization it is possible to control the current in superconductor.
The spin-valve consisted of two ferromagnetic cobalt layers, one superconductive niobium layer with thickness of approximately 150 atoms and a layer of gold.
But nevertheless this effect allows us to use the new method of manipulations with spins,
This finding is likely to spawn new developments in emerging technologies such as low-power electronics based on the spin of electrons or ultrafast quantum computers.
"The electrons in topological insulators have unique quantum properties that many scientists believe will be useful for developing spin-based electronics and quantum computers.
In addition to charge, electrons also have a degree of freedom known as spin. When spins line up parallel to each other (in a crystal, for example),
they form a ferromagnet--the type of magnet you might use on your refrigerator and that is used in the strip on your credit card.
Because spin has both a magnitude and a direction a spin-ordered phase is described by a vector.
Over the last several decades, physicists have developed sophisticated techniques to look for both of these types of phases.
if the building block of the ordered phase was a pair of oppositely pointing spins--one pointing north
In an experiment, recently published in Science("Probing Johnson noise and ballistic transport in normal metals with a single-spin qubit),
The findings were published today in the open-access journal Science Advances("Electrically controlling single-spin qubits in a continuous microwave field".
like the spin of a single phosphorus atom in isotopically enriched silicon, can be controlled using electric fields,
They then fabricated organic FETS by spin coating a solution of their material at 110 C before allowing it to cool.
and elsewhere using a technique called spin-polarized neutron reflectometry. They say the new finding could be used to probe a variety of exotic physical phenomena,
Possible applications of the new findings include the creation of spintronics, transistors based on the spin of particles rather than their charge.
which binds electrons in pairs through the entanglement of electron spins. However recent experiments have shown that this mechanism cannot explain the superconducting state in the quintessential unconventional superconductor Cecu2si2.
The electrons in Cecu2si2 can interact by entanglement of both spin and orbital states, resulting in multiple possible configurations or degrees of freedom.
This kind of electron binding may also be present in the recently discovered class of high-temperature iron-based superconductors. e found that the origin of the unconventional superconductivity in Cecu2si2 is an exotic multipole degree of freedom consisting of entangled spins
We then store the binary code of 0 or 1 on the'spin'of the electron,
and understand the intrinsic spin of electrons to advance nanoscale electronics is hampered by how hard it is to measure tiny, fast magnetic devices.
if perfected, could lead to a novel tabletop magnetic measurement technique and new, nanoscale electronic devices based on electrical spin, rather than charge.
"Why the interest in electron spin? In physics, electron spin is established the well phenomenon of electrons behaving like a quantum version of a spinning top,
An emerging field called spintronics explores the idea of using electron spin to control and store information using very low power. echnologies like nonvolatile magnetic memory could result with the broad understanding and application of electron spin.
Spintronics, the subject of the 2007 Nobel prize in Physics, is already impacting traditional electronics, which is based on the control of electron charge rather than spin. irect imaging is really hard to do,
The larger the angle between the adjacent atomic magnets, the stronger is the change in electrical resistance. lectrons have a spin,
By using a strong magnetic field that interacts with the nuclear spins of carbon atoms in the proteins,
and have developed the world's most efficient quantum bits in silicon using either the electron or nuclear spins of single phosphorus atoms.
#First pocket rockets take tiny satellites for a spin The next giant leap in space exploration could start with a small spin around the lab. A new propulsion system for shrunk-down satellites called Cubesats just passed a key lab test,
which will get its first test spin later this year. Rocket engines today more or less follow the same formula.
In the days after the Chernobyl nuclear accident in 1986 the German particle physicist Gerhard Knies
After uniformity is achieved by spin casting the mixture on a rotating substrate the material is annealed.
The extremely low temperature encourages the electrons to enter into exotic states where they no longer obey the laws of single particle physics,
"The team was trying to induce an electron spin transition in this non-Abelian state, but before the desired state was reached,
In addition to charge, electrons also have a degree of freedom known as spin.?When spins line up parallel to each other,
they form a ferromagnet. Because spin has both a magnitude and a direction, a spin-ordered phase is described by a vector. ver the several decades,
scientists have developed sophisticated techniques to look for both of these types of phases. ut what if the electrons in a material are ordered not in one of those ways?
In other words, what if the order were described not by a scalar or vector but by something with more dimensionality, like a matrix??
if the building block of the ordered phase was a pair of oppositely pointing spins described by what is known as a magnetic quadrupole.
The team calls this a"highly degenerate spin ice phase (Ice I)".But then they started to slowly cool the material down,
They call this the"long-range charge-and spin-ordered (LRO) phase"."""We were fascinated by the fact that our synthetic material displayed this everyday phenomenon of a phase transition,
are defined by the spin of a single electron. But by reconfiguring traditional transistors to only be associated with one electron,
We then store the binary code of 0 or 1 on the'spin'of the electron,
"In particle physics, every force is mediated by a special kind of force particle, and the force particle of the strong nuclear force is the gluon,
like the spin of a single phosphorus atom in isotopically enriched silicon, can be controlled using electric fields,
'will be used in quantum computers of the future to read information stored in the charge or spin of a single electron."
the research team led by Georg H. Endress Professor Patrick Maletinsky described how resonators made from single-crystalline diamonds with individually embedded electrons are suited highly to addressing the spin of these electrons.
Their"spin"or intrinsic angular momentum is examined in this research. When the resonator now begins to oscillate,
in turn, influences the spin of the electrons, which can indicate two possible directions("up"or"down")when measured.
The direction of the spin can be detected with the aid of fluorescence spectroscopy. Extremely fast spin oscillation In this latest publication, the scientists have shaken the resonators in a way that allows them to induce a coherent oscillation of the coupled spin for the first time.
This means that the spin of the electrons switches from up to down and vice versa in a controlled and rapid rhythm and that the scientists can control the spin status at any time.
This spin oscillation is compared fast with the frequency of the resonator. It also protects the spin against harmful decoherence mechanisms.
It is conceivable that this diamond resonator could be applied to sensors--potentially in a highly sensitive way
--because the oscillation of the resonator can be recorded via the altered spin. These new findings also allow the spin to be rotated coherently over a very long period of close to 100 microseconds,
making the measurement more precise. Nitrogen-vacancy centers could potentially also be used to develop a quantum computer.
In this case, the quick manipulation of its quantum states demonstrated in this work would be a decisive advantage e
< Back - Next >
Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011