Inhomogeneous boundary effects in semiconductor quantum wires
... be discussed in conjunction with boundary effects. Also, our calculation [7] of the multiple-parallel uniform quantum wire system, based on a conventional transport theory extended from the bulk system, shows that the conductance always has a sudden drop whenever the Fermi energy reaches the bottom ...
... be discussed in conjunction with boundary effects. Also, our calculation [7] of the multiple-parallel uniform quantum wire system, based on a conventional transport theory extended from the bulk system, shows that the conductance always has a sudden drop whenever the Fermi energy reaches the bottom ...
Trapping beam
... principle of the measurement • We trap one atom. • We switch off and on the dipole trap during t1. If the atom is recaptured, it starts to oscillate in the trap. • We wait for t and then, we switch off and on the dipole trap during t2. P(t) is the probability to recapture the atom after the ...
... principle of the measurement • We trap one atom. • We switch off and on the dipole trap during t1. If the atom is recaptured, it starts to oscillate in the trap. • We wait for t and then, we switch off and on the dipole trap during t2. P(t) is the probability to recapture the atom after the ...
File
... Density The properties of mass and volume can be used to describe another important general property of matter called density. Density is the mass per unit volume of an object. Density is important property because it allows you to compare different types of matter. Suppose you were asked to determi ...
... Density The properties of mass and volume can be used to describe another important general property of matter called density. Density is the mass per unit volume of an object. Density is important property because it allows you to compare different types of matter. Suppose you were asked to determi ...
Electronic Structure of Multi-Electron Quantum Dots
... method to study the electronic structure of multi-electron quantum dots [13]. This method is based on earlier work by quantum chemist R. Pauncz [14], which expands the multi-electron wavefunctions as linear combinations of antisymmetrised products of spatial wavefunctions and spin eigenfunctions. Th ...
... method to study the electronic structure of multi-electron quantum dots [13]. This method is based on earlier work by quantum chemist R. Pauncz [14], which expands the multi-electron wavefunctions as linear combinations of antisymmetrised products of spatial wavefunctions and spin eigenfunctions. Th ...
Chemical Formulas and Formula Weight Calculations
... formulated by the Italian scientist Amedeo Avogadro (1776‐1856). In 1811, Avogadro pointed out that: “Gay‐Lussac has shown in an interesting Memoir (Mémoires de la Société d'Arcueil, Tome II.) that gases always unite in a very simple proportion by volume, and that when the result of the union is a g ...
... formulated by the Italian scientist Amedeo Avogadro (1776‐1856). In 1811, Avogadro pointed out that: “Gay‐Lussac has shown in an interesting Memoir (Mémoires de la Société d'Arcueil, Tome II.) that gases always unite in a very simple proportion by volume, and that when the result of the union is a g ...
Quantum entanglement between the electron clouds of nucleic acids
... amount of entanglement in terms of negativity and single base von Neumann entropy. We find that the strength of the single base von Neumann entropy depends on the neighbouring sites, thus questioning the notion of treating single bases as logically independent units. We derive an analytical expressi ...
... amount of entanglement in terms of negativity and single base von Neumann entropy. We find that the strength of the single base von Neumann entropy depends on the neighbouring sites, thus questioning the notion of treating single bases as logically independent units. We derive an analytical expressi ...
From Quantum mechanics to nanoparticles and their applications
... properties (CdSe, …). They are made of a semiconductor nanostructure that confines the motion of conduction band electrons or valence band holes in all three spatial directions. This confinement can be obtained with electrostatic potentials, the presence of an interface between different semiconduct ...
... properties (CdSe, …). They are made of a semiconductor nanostructure that confines the motion of conduction band electrons or valence band holes in all three spatial directions. This confinement can be obtained with electrostatic potentials, the presence of an interface between different semiconduct ...
Sample Exercise 2.1 Illustrating the Size of an Atom
... Write the empirical formulas for the following molecules: (a) glucose, a substance also known as either blood sugar or dextrose, whose molecular formula is C6H12O6; (b) nitrous oxide, a substance used as an anesthetic and commonly called laughing gas, whose molecular formula is N2O. Solution ...
... Write the empirical formulas for the following molecules: (a) glucose, a substance also known as either blood sugar or dextrose, whose molecular formula is C6H12O6; (b) nitrous oxide, a substance used as an anesthetic and commonly called laughing gas, whose molecular formula is N2O. Solution ...
Ch02-sample-and-practice-set-2
... Write the empirical formulas for the following molecules: (a) glucose, a substance also known as either blood sugar or dextrose, whose molecular formula is C6H12O6; (b) nitrous oxide, a substance used as an anesthetic and commonly called laughing gas, whose molecular formula is N2O. Solution ...
... Write the empirical formulas for the following molecules: (a) glucose, a substance also known as either blood sugar or dextrose, whose molecular formula is C6H12O6; (b) nitrous oxide, a substance used as an anesthetic and commonly called laughing gas, whose molecular formula is N2O. Solution ...
Hydrogen 1
... Functions Rn,l(r), and they depend on two quantum numbers n and l. Let us look at the solutions in the special case where l = 0 (no angular momentum). In this case equation (18) becomes ...
... Functions Rn,l(r), and they depend on two quantum numbers n and l. Let us look at the solutions in the special case where l = 0 (no angular momentum). In this case equation (18) becomes ...
Introduction to the Fractional Quantum Hall Effect
... quantum number ν is a simple integer with a precision of about 10−10 and an absolute accuracy of about 10−8 (both being limited by our ability to do resistance metrology). In 1982, Tsui, Störmer and Gossard discovered that in certain devices with reduced (but still non-zero) disorder, the quantum n ...
... quantum number ν is a simple integer with a precision of about 10−10 and an absolute accuracy of about 10−8 (both being limited by our ability to do resistance metrology). In 1982, Tsui, Störmer and Gossard discovered that in certain devices with reduced (but still non-zero) disorder, the quantum n ...
Correlated many-electron states in a quantum dot containing a
... The authors of Ref. 10 found the unexpected result that the exchange term ⌬Z was independent of the filling of the shell in a limited Hilbert space 共involving only the partially filled s, p, and d shells兲. If all configurations are included the ⌬Z slightly changed due to the presence of excitations. ...
... The authors of Ref. 10 found the unexpected result that the exchange term ⌬Z was independent of the filling of the shell in a limited Hilbert space 共involving only the partially filled s, p, and d shells兲. If all configurations are included the ⌬Z slightly changed due to the presence of excitations. ...
Is gravitational mass of a composite quantum body equivalent to its
... We define passive gravitational mass operator of a hydrogen atom in the post-Newtonian approximation of general relativity and show that it does not commute with energy operator, taken in the absence of gravitational field. Nevertheless, the equivalence between the expectation values of passive grav ...
... We define passive gravitational mass operator of a hydrogen atom in the post-Newtonian approximation of general relativity and show that it does not commute with energy operator, taken in the absence of gravitational field. Nevertheless, the equivalence between the expectation values of passive grav ...
Phys. Rev. Lett. 93, 073002
... state potential. If the virtual intermediate level of energy h! ! a is relatively close to a real molecular level, as in the case of our experiment, the effective two-photon Rabi frequency of the process is given by "eff # "a "b =$2#%, where "a;b are the respective one-photon Rabi frequencies and # ...
... state potential. If the virtual intermediate level of energy h! ! a is relatively close to a real molecular level, as in the case of our experiment, the effective two-photon Rabi frequency of the process is given by "eff # "a "b =$2#%, where "a;b are the respective one-photon Rabi frequencies and # ...
100, 027001 (2008)
... prepared in a hyperfine state j#i, while the atoms in the other hyperfine state j"i do not participate in the p-wave pairing, and therefore constitute the normal phase. The interference between the superfluid and normal phases can be realized through a two-photon Raman process that couples the two s ...
... prepared in a hyperfine state j#i, while the atoms in the other hyperfine state j"i do not participate in the p-wave pairing, and therefore constitute the normal phase. The interference between the superfluid and normal phases can be realized through a two-photon Raman process that couples the two s ...
Quantum Mechanics of Many-Electrons Systems and the Theories of
... most of our understanding about the structure and properties of atoms and molecules derives from calculations based on IPM models. The first general treatment for many-electron atoms was proposed by Hartree22, who suggested that electrons in atoms would move independently of each other, the motion o ...
... most of our understanding about the structure and properties of atoms and molecules derives from calculations based on IPM models. The first general treatment for many-electron atoms was proposed by Hartree22, who suggested that electrons in atoms would move independently of each other, the motion o ...
CHEM 1405 Practice Exam #2 (2015)
... 1) Which is the subatomic particle having a negligible mass and a negative charge? A) electron B) neutron C) proton D) quark 2) What is the electron configuration for an atom of fluorine? A) 1s2 2s2 2p3 B) 1s2 2s2 2p5 3) How many neutrons are in the nucleus of an atom of A) 50 C) 1s2 2s2 2p6 3s1 ...
... 1) Which is the subatomic particle having a negligible mass and a negative charge? A) electron B) neutron C) proton D) quark 2) What is the electron configuration for an atom of fluorine? A) 1s2 2s2 2p3 B) 1s2 2s2 2p5 3) How many neutrons are in the nucleus of an atom of A) 50 C) 1s2 2s2 2p6 3s1 ...
Bohr model
In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with attraction provided by electrostatic forces rather than gravity. After the cubic model (1902), the plum-pudding model (1904), the Saturnian model (1904), and the Rutherford model (1911) came the Rutherford–Bohr model or just Bohr model for short (1913). The improvement to the Rutherford model is mostly a quantum physical interpretation of it. The Bohr model has been superseded, but the quantum theory remains sound.The model's key success lay in explaining the Rydberg formula for the spectral emission lines of atomic hydrogen. While the Rydberg formula had been known experimentally, it did not gain a theoretical underpinning until the Bohr model was introduced. Not only did the Bohr model explain the reason for the structure of the Rydberg formula, it also provided a justification for its empirical results in terms of fundamental physical constants.The Bohr model is a relatively primitive model of the hydrogen atom, compared to the valence shell atom. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader and much more accurate quantum mechanics and thus may be considered to be an obsolete scientific theory. However, because of its simplicity, and its correct results for selected systems (see below for application), the Bohr model is still commonly taught to introduce students to quantum mechanics or energy level diagrams before moving on to the more accurate, but more complex, valence shell atom. A related model was originally proposed by Arthur Erich Haas in 1910, but was rejected. The quantum theory of the period between Planck's discovery of the quantum (1900) and the advent of a full-blown quantum mechanics (1925) is often referred to as the old quantum theory.