Andersen_03
... spatial gradient that we normally find in shorter, higher-frequency "vectorial" waves. And not only would they be low in frequency, but they would also actually be compound waves composed of the original wavefront and its returning predecessor (akin to a reflection) that just traveled the World in 1 ...
... spatial gradient that we normally find in shorter, higher-frequency "vectorial" waves. And not only would they be low in frequency, but they would also actually be compound waves composed of the original wavefront and its returning predecessor (akin to a reflection) that just traveled the World in 1 ...
Text - Enlighten: Publications
... These nanomagnet systems can be fabricated from thin film ferromagnetic materials such as Permalloy (an alloy of Ni80%Fe20%) or cobalt, and the size of the nanomagnets is chosen to ensure that they are single domain with the now macroscopic magnetic moments taking on the role of the Ising spins in t ...
... These nanomagnet systems can be fabricated from thin film ferromagnetic materials such as Permalloy (an alloy of Ni80%Fe20%) or cobalt, and the size of the nanomagnets is chosen to ensure that they are single domain with the now macroscopic magnetic moments taking on the role of the Ising spins in t ...
The potential difference is the work per unit charge, which is
... This law is relating the distribution of electric charge to the resulting electric field. Gauss's law states that: The electric flux through any closed surface is proportional to the enclosed electric charge. The law was formulated by C. F. Gauss in 1835, but was not published until 1867. It is one ...
... This law is relating the distribution of electric charge to the resulting electric field. Gauss's law states that: The electric flux through any closed surface is proportional to the enclosed electric charge. The law was formulated by C. F. Gauss in 1835, but was not published until 1867. It is one ...
Colloidal Dispersions in Fluid Media: Electric, Magnetic and Light Control
... difference between the osmotic pressure of the particles and the bulk solution. It is possible to show29 that the repulsive interaction per unit area between two approaching double layers is given by: ...
... difference between the osmotic pressure of the particles and the bulk solution. It is possible to show29 that the repulsive interaction per unit area between two approaching double layers is given by: ...
RF Cavities - CERN Accelerator School
... which is the Laplace equation in 4 dimensions. With the boundaries of the “solid body” around it (the cavity walls), there exist eigensolutions of the cavity at certain frequencies (eigenfrequencies). 23-Sept-2010 ...
... which is the Laplace equation in 4 dimensions. With the boundaries of the “solid body” around it (the cavity walls), there exist eigensolutions of the cavity at certain frequencies (eigenfrequencies). 23-Sept-2010 ...
Spin and Charge Fluctuations in Strongly Correlated Systems
... In high-Tc cuprates and organic Mott insulators, the Coulomb interaction dominants over kinetic energy, meaning that the on-site Coulomb repulsion is greater than the electron band-width. The result of this is a Mott insulator in the undoped case, which would otherwise be a conductor as there are od ...
... In high-Tc cuprates and organic Mott insulators, the Coulomb interaction dominants over kinetic energy, meaning that the on-site Coulomb repulsion is greater than the electron band-width. The result of this is a Mott insulator in the undoped case, which would otherwise be a conductor as there are od ...
Field-based scanning tunneling microscope manipulation of antimony dimers on Si 001 „
... manipulation will be investigated. In this article, we study the directed manipulation of Sb2 ad-dimers on Si共001兲 and investigate a model based on a force between the adsorbate and the tip due to the gradient of the electric field. If the anisotropy in the motion resulting from the tip field is suf ...
... manipulation will be investigated. In this article, we study the directed manipulation of Sb2 ad-dimers on Si共001兲 and investigate a model based on a force between the adsorbate and the tip due to the gradient of the electric field. If the anisotropy in the motion resulting from the tip field is suf ...
Widening the Axion Window via Kinetic and Stückelberg Mixings
... reflected by the Hodge numbers h , hð2;1Þ , and hþ expressing the number of orientifold-even or -odd 2-forms, 3-forms, and 4-forms, respectively, and thereby setting the number N a of axions. De Rahm duality then associates to every axion an orientifold-even or -odd closed p cycle γ i on the CY 3 o ...
... reflected by the Hodge numbers h , hð2;1Þ , and hþ expressing the number of orientifold-even or -odd 2-forms, 3-forms, and 4-forms, respectively, and thereby setting the number N a of axions. De Rahm duality then associates to every axion an orientifold-even or -odd closed p cycle γ i on the CY 3 o ...
Magnetic fields and the variable wind of the β Ori early-type supergiant
... 8 M⊙ , where M⊙ is the solar mass. Such stars begin their main sequence (hydrogenburning) lives with a spectral type of O or B, with effective temperatures Teff ranging from 25, 000 − 50, 000 K, significantly hotter than the solar value of Teff ≃ 5780 K. Their high temperatures cause their spectral ...
... 8 M⊙ , where M⊙ is the solar mass. Such stars begin their main sequence (hydrogenburning) lives with a spectral type of O or B, with effective temperatures Teff ranging from 25, 000 − 50, 000 K, significantly hotter than the solar value of Teff ≃ 5780 K. Their high temperatures cause their spectral ...
"Radial Compression and Inward Transport of Positron Plasmas Using a Rotating Electric Field" Phys. Plasmas 8 (2001), pp.1879-85 R. G. Greaves and C. M. Surko (PDF)
... In the case of both electron and ion plasmas, the heating produced by the applied rotating electric field must be counteracted by applying some form of strong cooling to the plasma. Both laser cooling and neutral gas cooling have been employed in ion plasma experiments. Early electron plasma experim ...
... In the case of both electron and ion plasmas, the heating produced by the applied rotating electric field must be counteracted by applying some form of strong cooling to the plasma. Both laser cooling and neutral gas cooling have been employed in ion plasma experiments. Early electron plasma experim ...
Ten years of marine CSEM for hydrocarbon exploration
... measurements is probably that of Bannister 共1968兲, who presented theory for frequency-domain, seafloor-to-seafloor dipole-dipole measurements to determine seabed resistivity. Bannister also recognized the noise problems associated with magnetometers vibrating or moving in earth’s main field and reco ...
... measurements is probably that of Bannister 共1968兲, who presented theory for frequency-domain, seafloor-to-seafloor dipole-dipole measurements to determine seabed resistivity. Bannister also recognized the noise problems associated with magnetometers vibrating or moving in earth’s main field and reco ...
Field (physics)
In physics, a field is a physical quantity that has a value for each point in space and time. For example, on a weather map, the surface wind velocity is described by assigning a vector to each point on a map. Each vector represents the speed and direction of the movement of air at that point. As another example, an electric field can be thought of as a ""condition in space"" emanating from an electric charge and extending throughout the whole of space. When a test electric charge is placed in this electric field, the particle accelerates due to a force. Physicists have found the notion of a field to be of such practical utility for the analysis of forces that they have come to think of a force as due to a field.In the modern framework of the quantum theory of fields, even without referring to a test particle, a field occupies space, contains energy, and its presence eliminates a true vacuum. This lead physicists to consider electromagnetic fields to be a physical entity, making the field concept a supporting paradigm of the edifice of modern physics. ""The fact that the electromagnetic field can possess momentum and energy makes it very real... a particle makes a field, and a field acts on another particle, and the field has such familiar properties as energy content and momentum, just as particles can have"". In practice, the strength of most fields has been found to diminish with distance to the point of being undetectable. For instance the strength of many relevant classical fields, such as the gravitational field in Newton's theory of gravity or the electrostatic field in classical electromagnetism, is inversely proportional to the square of the distance from the source (i.e. they follow the Gauss's law). One consequence is that the Earth's gravitational field quickly becomes undetectable on cosmic scales.A field can be classified as a scalar field, a vector field, a spinor field or a tensor field according to whether the represented physical quantity is a scalar, a vector, a spinor or a tensor, respectively. A field has a unique tensorial character in every point where it is defined: i.e. a field cannot be a scalar field somewhere and a vector field somewhere else. For example, the Newtonian gravitational field is a vector field: specifying its value at a point in spacetime requires three numbers, the components of the gravitational field vector at that point. Moreover, within each category (scalar, vector, tensor), a field can be either a classical field or a quantum field, depending on whether it is characterized by numbers or quantum operators respectively. In fact in this theory an equivalent representation of field is a field particle, namely a boson.