Statistical Mechanics course 203-24171 Number of points (=pts) indicated in margin. 16.8.09
... (d) The container above, called A, with H 6= 0 is now attached to an identical container B (same fermions at density n, T = 0), but with H = 0. In which direction will the fermions flow initially? Specify your answer for d = 1, 2, 3 at relevant ranges of H. ...
... (d) The container above, called A, with H 6= 0 is now attached to an identical container B (same fermions at density n, T = 0), but with H = 0. In which direction will the fermions flow initially? Specify your answer for d = 1, 2, 3 at relevant ranges of H. ...
Optically polarized atoms
... • while nuclear size R is on the order of a few fermi (1 fermi = 1 fm = 10-13 cm) • Ratio between system size and wavelength similar to that for atoms • However, high-multipolarity transitions are often important; this is when low-multipolarity transitions are suppressed by selection rules – High-an ...
... • while nuclear size R is on the order of a few fermi (1 fermi = 1 fm = 10-13 cm) • Ratio between system size and wavelength similar to that for atoms • However, high-multipolarity transitions are often important; this is when low-multipolarity transitions are suppressed by selection rules – High-an ...
Module 7 : Antenna Lecture 48
... Hertz Diople Antenna An infinitesimal element excited with an alternating current is called the Hertz dipole. In practice a linear antenna can be approximated by a Hertz dipole if the linear antenna is of size much smaller the wavelength. The analysis of Hertz dipole is important as any complicated ...
... Hertz Diople Antenna An infinitesimal element excited with an alternating current is called the Hertz dipole. In practice a linear antenna can be approximated by a Hertz dipole if the linear antenna is of size much smaller the wavelength. The analysis of Hertz dipole is important as any complicated ...
Chapter 3 The Statistical Theory of Thermodynamics 3.1 Macrostate
... (a) the microcanonical ensemble pertains to isolated systems (i.e., at fixed E, V, N); the copies in the ensemble are also isolated from each other (i.e., a single isolated system). The key state function is entropy S(E, V, N). (b) the canonical ensemble pertains to systems in contact with a heat ba ...
... (a) the microcanonical ensemble pertains to isolated systems (i.e., at fixed E, V, N); the copies in the ensemble are also isolated from each other (i.e., a single isolated system). The key state function is entropy S(E, V, N). (b) the canonical ensemble pertains to systems in contact with a heat ba ...
Lectures in Physics, summer 2008/09 3
... light and the wavelengths for Balmer, Paschen, Lyman, etc. series will be correctly described by the same expressions as those derived from the Bohr model. Energy difference between the levels ΔE=13.6(1/nf2-1/ni2) For example, transition between ni=2 and nf=1 (as drawn in the picture) will release t ...
... light and the wavelengths for Balmer, Paschen, Lyman, etc. series will be correctly described by the same expressions as those derived from the Bohr model. Energy difference between the levels ΔE=13.6(1/nf2-1/ni2) For example, transition between ni=2 and nf=1 (as drawn in the picture) will release t ...
Cold magnetically trapped scandium atoms. II. Scattering dynamics D Groenenboom
... atoms have only been performed using model potentials. See, for example, Ref. [15], which describes Zeeman relaxation of dysprosium atoms, using a universal single-channel scattering model and a long-range dispersion potential determined from experimental atomic energy levels. Feshbach resonances in ...
... atoms have only been performed using model potentials. See, for example, Ref. [15], which describes Zeeman relaxation of dysprosium atoms, using a universal single-channel scattering model and a long-range dispersion potential determined from experimental atomic energy levels. Feshbach resonances in ...
Carolyn Tewksbury
... do not appear to be formed by post-emplacement deformation. Based on the surface expression of the dike, Delaney and Pollard (1981) modeled the subsurface structure of the northeast dike and concluded that the en echelon segments formed due to rotation of the maximum horizontal compressive stress di ...
... do not appear to be formed by post-emplacement deformation. Based on the surface expression of the dike, Delaney and Pollard (1981) modeled the subsurface structure of the northeast dike and concluded that the en echelon segments formed due to rotation of the maximum horizontal compressive stress di ...
Melting of a 2D quantum electron solid in high magnetic field LETTERS
... Tcm = e2 n/(4πkB Γ ) (where kB is the Boltzman constant) with Γ ∼ 130, in excellent agreement with theoretical calculations7,8 . The 2DES as realized in the high-quality GaAs/AlGaAs structures in our experiment has relatively high n, thus (in the absence of magnetic fields) the zero-point motion ( E ...
... Tcm = e2 n/(4πkB Γ ) (where kB is the Boltzman constant) with Γ ∼ 130, in excellent agreement with theoretical calculations7,8 . The 2DES as realized in the high-quality GaAs/AlGaAs structures in our experiment has relatively high n, thus (in the absence of magnetic fields) the zero-point motion ( E ...
3 The Magnetosphere
... the center (equatorial plane). This pressure gradient creates a current in the plasma sheet. Since the magnetic field lines in the north and south lobes are in opposite directions, the plasma sheet currents are duskward. In the distant plasma sheet, the lobe magnetic pressure and the plasma pressure ...
... the center (equatorial plane). This pressure gradient creates a current in the plasma sheet. Since the magnetic field lines in the north and south lobes are in opposite directions, the plasma sheet currents are duskward. In the distant plasma sheet, the lobe magnetic pressure and the plasma pressure ...
Chapter 5 Electrons in Atoms
... energy level of the electron: 1, 2, 3, etc. Within each energy level, the complex math of Schrodinger’s equation describes several shapes. These are called atomic orbitals (coined by scientists in 1932) - regions where there is a high probability of finding an electron. Sublevels- like theater seats ...
... energy level of the electron: 1, 2, 3, etc. Within each energy level, the complex math of Schrodinger’s equation describes several shapes. These are called atomic orbitals (coined by scientists in 1932) - regions where there is a high probability of finding an electron. Sublevels- like theater seats ...
Primer on topological insulators
... We have reduced the linear operator Ĥ (an ’infinite dimensional matrix’) to a one parameter family chain of N block matrices Ĥk . Suppose we had managed to diagonalize the operators Ĥk , to find a spectrum of eigenvalues {k,n } (along with the Bloch eigenfunctions {φkn }.) We then wind up with t ...
... We have reduced the linear operator Ĥ (an ’infinite dimensional matrix’) to a one parameter family chain of N block matrices Ĥk . Suppose we had managed to diagonalize the operators Ĥk , to find a spectrum of eigenvalues {k,n } (along with the Bloch eigenfunctions {φkn }.) We then wind up with t ...
Advanced Chemistry - Forestville Middle
... Inspection of this equation reveals that only extremely small objects, such as subatomic particles, have wavelengths sufficiently large as to be observable. In other words, the wavelength associated with a golf ball, for example, is so tiny as to be completely out of the range of any visible observa ...
... Inspection of this equation reveals that only extremely small objects, such as subatomic particles, have wavelengths sufficiently large as to be observable. In other words, the wavelength associated with a golf ball, for example, is so tiny as to be completely out of the range of any visible observa ...
Ferromagnetism
Not to be confused with Ferrimagnetism; for an overview see Magnetism.Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets. In physics, several different types of magnetism are distinguished. Ferromagnetism (including ferrimagnetism) is the strongest type: it is the only one that typically creates forces strong enough to be felt, and is responsible for the common phenomena of magnetism in magnets encountered in everyday life. Substances respond weakly to magnetic fields with three other types of magnetism, paramagnetism, diamagnetism, and antiferromagnetism, but the forces are usually so weak that they can only be detected by sensitive instruments in a laboratory. An everyday example of ferromagnetism is a refrigerator magnet used to hold notes on a refrigerator door. The attraction between a magnet and ferromagnetic material is ""the quality of magnetism first apparent to the ancient world, and to us today"".Permanent magnets (materials that can be magnetized by an external magnetic field and remain magnetized after the external field is removed) are either ferromagnetic or ferrimagnetic, as are other materials that are noticeably attracted to them. Only a few substances are ferromagnetic. The common ones are iron, nickel, cobalt and most of their alloys, some compounds of rare earth metals, and a few naturally-occurring minerals such as lodestone.Ferromagnetism is very important in industry and modern technology, and is the basis for many electrical and electromechanical devices such as electromagnets, electric motors, generators, transformers, and magnetic storage such as tape recorders, and hard disks.