Excitonic exchange splitting in bulk semiconductors
... example, the LDA-calculated hole and electron masses of bulk InP are, respectively, 0.42 and 0.057, which are smaller than the respective experimental values 0.60 ~Ref. 27! and 0.077 ~Ref. 28!. For this reason, we calculate the excitonic Bohr radius a B using the experimental effective masses and st ...
... example, the LDA-calculated hole and electron masses of bulk InP are, respectively, 0.42 and 0.057, which are smaller than the respective experimental values 0.60 ~Ref. 27! and 0.077 ~Ref. 28!. For this reason, we calculate the excitonic Bohr radius a B using the experimental effective masses and st ...
PHYSICS 430 Lecture Notes on Quantum Mechanics
... where m is the mass and p is the momentum of the baseball. We want to find the solution of these equations such that x(t0 ) = Xin and x(t0 + ∆t) = Xf , where Xin and Xf are, respectively, the (initial) height of your hand when the baseball leaves it, and the (final) height of your hand when you catc ...
... where m is the mass and p is the momentum of the baseball. We want to find the solution of these equations such that x(t0 ) = Xin and x(t0 + ∆t) = Xf , where Xin and Xf are, respectively, the (initial) height of your hand when the baseball leaves it, and the (final) height of your hand when you catc ...
Barrier-free intermolecular proton transfer induced by excess
... As our primary research method we applied density functional theory 共DFT兲 with a Becke’s three parameter hybrid functional 共B3LYP兲25–27 and a modified Perdew–Wang one-parameter-method for kinetics 共MPW1K兲 designed by Truhlar et al.28 In both DFT approaches we used the same 6-31⫹⫹G** basis set.29,30 ...
... As our primary research method we applied density functional theory 共DFT兲 with a Becke’s three parameter hybrid functional 共B3LYP兲25–27 and a modified Perdew–Wang one-parameter-method for kinetics 共MPW1K兲 designed by Truhlar et al.28 In both DFT approaches we used the same 6-31⫹⫹G** basis set.29,30 ...
Quantum Entanglement and Information Quantifier for Correlated
... predict a possibility to beat such a limit [26]. It is shown that, surprisingly, for states with high temperature, phase estimation is better for states with only classical correlations [27,28] than with entangled GHZ diagonal states [29]. It is well known that, the correlation between quantum entan ...
... predict a possibility to beat such a limit [26]. It is shown that, surprisingly, for states with high temperature, phase estimation is better for states with only classical correlations [27,28] than with entangled GHZ diagonal states [29]. It is well known that, the correlation between quantum entan ...
International Journal of Molecular Sciences
... Photovoltaic solar cells are commonly classified as first-, second- and third-generation devices. Most of the devices on the market now are first and second generation cells, which are based on crystalline silicon and CdTe thin film, respectively. High purity requirements for the silicon crystals, h ...
... Photovoltaic solar cells are commonly classified as first-, second- and third-generation devices. Most of the devices on the market now are first and second generation cells, which are based on crystalline silicon and CdTe thin film, respectively. High purity requirements for the silicon crystals, h ...
defense - Purdue University
... • From Heitler London to Full CI Approach: • atomistic basis for exchange calculations • orbital interactions for short distances • Interpolate TCAD potential on atomistic lattice • Heitler-London scaled and tested for 4 M atoms removing previous computational bottlenecks. Sensitivity of J(V) to don ...
... • From Heitler London to Full CI Approach: • atomistic basis for exchange calculations • orbital interactions for short distances • Interpolate TCAD potential on atomistic lattice • Heitler-London scaled and tested for 4 M atoms removing previous computational bottlenecks. Sensitivity of J(V) to don ...
Quantum Hall effect in graphene: Status and prospects
... cyclotron motion. This unconventional QHE forms a series of filling factors v=±2, ±6, ±10,… [Whereas for non-relativistic two-dimensional electron systems (2DES) or standard 2DES, the Hall conductivity, σxy=±4ne2/h]. That is why; it is characterized as halfinteger quantum Hall effect or anomalous qu ...
... cyclotron motion. This unconventional QHE forms a series of filling factors v=±2, ±6, ±10,… [Whereas for non-relativistic two-dimensional electron systems (2DES) or standard 2DES, the Hall conductivity, σxy=±4ne2/h]. That is why; it is characterized as halfinteger quantum Hall effect or anomalous qu ...
Solids and Light instructional units in one PDF fi
... Our goal for this series of activities is to understand how these devices work. To accomplish this understanding we need to learn about the emission of light by atoms. Because we cannot see atoms as they emit light, we will need to build a conceptual model of what is happening at the atomic level an ...
... Our goal for this series of activities is to understand how these devices work. To accomplish this understanding we need to learn about the emission of light by atoms. Because we cannot see atoms as they emit light, we will need to build a conceptual model of what is happening at the atomic level an ...
Electron-hole correlations in semiconductor quantum dots with tight-binding wave functions
... theoretical approaches are multiband effective-mass theory,4,11 empirical pseudopotential theory,12–14 tightbinding methods,15–19 and quasiparticle calculations20 with the GW approximation.23 Quantum dots are intermediate between molecular and bulk systems. This is reflected in the different theoret ...
... theoretical approaches are multiband effective-mass theory,4,11 empirical pseudopotential theory,12–14 tightbinding methods,15–19 and quasiparticle calculations20 with the GW approximation.23 Quantum dots are intermediate between molecular and bulk systems. This is reflected in the different theoret ...
On Participatory Realism
... Einstein. He wrote in the “Reply to Criticisms” section of the Schilpp volume [112]: A few more remarks of a general nature concerning concepts and [also] concerning the insinuation that a concept—for example that of the real—is something metaphysical (and therefore to be rejected). A basic conceptu ...
... Einstein. He wrote in the “Reply to Criticisms” section of the Schilpp volume [112]: A few more remarks of a general nature concerning concepts and [also] concerning the insinuation that a concept—for example that of the real—is something metaphysical (and therefore to be rejected). A basic conceptu ...
ELECTRON TRANSPORT AT THE NANOSCALE Lecture Notes, preliminary version Geert Brocks December 2005
... metals and the middle region consists of an insulator material, usually a metal-oxide.8 Such devices can be made in a very controlled way with the middle region having a thickness of a few nm. One is interested in electrical currents, i.e. the transport of electrons through such junctions, or more g ...
... metals and the middle region consists of an insulator material, usually a metal-oxide.8 Such devices can be made in a very controlled way with the middle region having a thickness of a few nm. One is interested in electrical currents, i.e. the transport of electrons through such junctions, or more g ...
Collisional properties of ultracold potassium
... owing to its small scattering length. This problem will be exacerbated if the scattering lengths turn out to be negative. Figure 1 illustrates this point, by showing the energydependent s-wave cross sections for u 22& 1 u 22& collisions. For a small positive value of a t (39), the cross section rema ...
... owing to its small scattering length. This problem will be exacerbated if the scattering lengths turn out to be negative. Figure 1 illustrates this point, by showing the energydependent s-wave cross sections for u 22& 1 u 22& collisions. For a small positive value of a t (39), the cross section rema ...
Gate-defined quantum confinement in suspended bilayer graphene
... Fermi energy in the top-gated regions at the middle of the ν = 0 gap while allowing occupation of higher Landau levels elsewhere, shown schematically in Fig. 3a. It should be noted that measurements in the quantum Hall regime are conducted in the valley-polarized ν = 0 state, far from the transition ...
... Fermi energy in the top-gated regions at the middle of the ν = 0 gap while allowing occupation of higher Landau levels elsewhere, shown schematically in Fig. 3a. It should be noted that measurements in the quantum Hall regime are conducted in the valley-polarized ν = 0 state, far from the transition ...
A Theoretical Study of Atomic Trimers in the Critical Stability Region
... ; it is a sum of three pairwise long-range Coulomb potentials. In molecular or nuclear (three-body) systems, we do not know the potential exactly 3 . Here the three particles are complex, i.e. composed of other particles. This means that the total potential of the (three-body) system can no longer b ...
... ; it is a sum of three pairwise long-range Coulomb potentials. In molecular or nuclear (three-body) systems, we do not know the potential exactly 3 . Here the three particles are complex, i.e. composed of other particles. This means that the total potential of the (three-body) system can no longer b ...
using standard syste - the Max Planck Institute for the Physics of
... the classical equations of motion and the existence of chaos in the classical dynamics of the three-body system. Two-electron atoms have played an important role in the development of theoretical physics in this century: They were a catalyst for the quantum theory in the mid 1920s, since the old qua ...
... the classical equations of motion and the existence of chaos in the classical dynamics of the three-body system. Two-electron atoms have played an important role in the development of theoretical physics in this century: They were a catalyst for the quantum theory in the mid 1920s, since the old qua ...
Chapter 28: Quantum Physics
... orbit the nucleus. Quantum mechanics can be used to determine the allowed energy levels and wave functions for the electrons. ...
... orbit the nucleus. Quantum mechanics can be used to determine the allowed energy levels and wave functions for the electrons. ...
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.