Bose-Einstein condensation of excitons and cold atoms OECS13
... coherence and condensation, phase singularities, spatial ordering, and polarization textures in a cold excitons gas [1, 2]. We develop a theoretical model accounting for the spin-orbit interaction of electrons and holes, exchange splitting of exciton states and Zeeman effect. This model describes th ...
... coherence and condensation, phase singularities, spatial ordering, and polarization textures in a cold excitons gas [1, 2]. We develop a theoretical model accounting for the spin-orbit interaction of electrons and holes, exchange splitting of exciton states and Zeeman effect. This model describes th ...
Chapter 2 ATOMIC THEORY
... Neglecting the electrons, the maximum electric force the α particle would encounter is that at the surface of the positively charged sphere. Johannes Kepler was the first to mathematically formulate Tycho Brahe’s precise measurements of the motion of planets, showing that the orbit of the planets ar ...
... Neglecting the electrons, the maximum electric force the α particle would encounter is that at the surface of the positively charged sphere. Johannes Kepler was the first to mathematically formulate Tycho Brahe’s precise measurements of the motion of planets, showing that the orbit of the planets ar ...
Chapter 2 ATOMIC THEORY - Beck-Shop
... Neglecting the electrons, the maximum electric force the α particle would encounter is that at the surface of the positively charged sphere. Johannes Kepler was the first to mathematically formulate Tycho Brahe’s precise measurements of the motion of planets, showing that the orbit of the planets ar ...
... Neglecting the electrons, the maximum electric force the α particle would encounter is that at the surface of the positively charged sphere. Johannes Kepler was the first to mathematically formulate Tycho Brahe’s precise measurements of the motion of planets, showing that the orbit of the planets ar ...
Lecture 15 (Slides) September 28
... Particle in a Box Model • We live in a three dimensional world and would expect the wave functions used to describe atomic and molecular systems to have three spatial coordinates and time. We could write Ψ(x,y,z,t) and Ψ(r,ϴ,φ,t) for wave functions. In some cases the properties and energies of an a ...
... Particle in a Box Model • We live in a three dimensional world and would expect the wave functions used to describe atomic and molecular systems to have three spatial coordinates and time. We could write Ψ(x,y,z,t) and Ψ(r,ϴ,φ,t) for wave functions. In some cases the properties and energies of an a ...
August 2010 Regents Exam part 1
... (1) total mass of all the protons and neutrons in an atom of Ti (2) total mass of all the protons, neutrons, and electrons in an atom of Ti (3) weighted average mass of the most abundant isotope of Ti (4) weighted average mass of all the naturally occurring isotopes of Ti ...
... (1) total mass of all the protons and neutrons in an atom of Ti (2) total mass of all the protons, neutrons, and electrons in an atom of Ti (3) weighted average mass of the most abundant isotope of Ti (4) weighted average mass of all the naturally occurring isotopes of Ti ...
Advanced Chemistry Midterm
... b. different numbers of protons and different numbers of neutrons c. the same number of protons but different numbers of neutrons d. the same number of neutrons but different numbers of protons 100. An alpha particle is the same as a(n) a. helium nucleus b. deuterium nucleus c. electron d. neutron ...
... b. different numbers of protons and different numbers of neutrons c. the same number of protons but different numbers of neutrons d. the same number of neutrons but different numbers of protons 100. An alpha particle is the same as a(n) a. helium nucleus b. deuterium nucleus c. electron d. neutron ...
Midterm Review Questions and Answers
... 19. A student determines the density of a piece of aluminum to be 2.2 g/cm3. What is his percent error? ...
... 19. A student determines the density of a piece of aluminum to be 2.2 g/cm3. What is his percent error? ...
Summary
... With the realization of coherent, laser-like atoms in the form of Bose-Einstein condensates it has become possible to explore matter-wave amplification, a process in which the number of atoms in a quantum state is amplified due to bosonic stimulation. In previous amplifiers based on superradiant Ray ...
... With the realization of coherent, laser-like atoms in the form of Bose-Einstein condensates it has become possible to explore matter-wave amplification, a process in which the number of atoms in a quantum state is amplified due to bosonic stimulation. In previous amplifiers based on superradiant Ray ...
Posttest for Uncertainty Principle Part 1
... 1. Ignore normalization issues pertaining to the wave function. At time t=0, the wave packet of a quantum mechanical particle is highly peaked and can be effectively described by a delta function (x) . Is the momentum of this particle well-defined at t=0? Is the position of the particle well-defin ...
... 1. Ignore normalization issues pertaining to the wave function. At time t=0, the wave packet of a quantum mechanical particle is highly peaked and can be effectively described by a delta function (x) . Is the momentum of this particle well-defined at t=0? Is the position of the particle well-defin ...
Section 11.3 Atomic Orbitals
... Atoms Beyond Hydrogen • Pauli Exclusion Principle - No 2electrons in the same atom can have the same set of 4 quantum numbers. An atomic orbital can hold a maximum of 2 electrons and those 2 electrons must have opposite spins • Hund’s Rule – every orbital in a subshell is singly occupied with one el ...
... Atoms Beyond Hydrogen • Pauli Exclusion Principle - No 2electrons in the same atom can have the same set of 4 quantum numbers. An atomic orbital can hold a maximum of 2 electrons and those 2 electrons must have opposite spins • Hund’s Rule – every orbital in a subshell is singly occupied with one el ...
CHE 105 Spring 2016 Exam 3
... Visible light is emitted from a hydrogen atom when an electron moves from the n = 3 level to the n = 2 level. Light emitted when an electron moves from n = 4 to n = 3 is not in the visible region. Is it in the infrared or ultraviolet region of the electromagnetic spectrum? Why? A. Infrared, because ...
... Visible light is emitted from a hydrogen atom when an electron moves from the n = 3 level to the n = 2 level. Light emitted when an electron moves from n = 4 to n = 3 is not in the visible region. Is it in the infrared or ultraviolet region of the electromagnetic spectrum? Why? A. Infrared, because ...
Section 8.4 Molecular Shapes VSEPR Model • The shape of a
... Section 8.4 VSEPR Model (cont.) • Start with the central atom. • Identify how many bonds or shared pairs are on the central atom. • Then identify how many unshared pairs or lone pairs are on the central atom. • Each combination of shared and unshared pairs will represent a specific molecular shape. ...
... Section 8.4 VSEPR Model (cont.) • Start with the central atom. • Identify how many bonds or shared pairs are on the central atom. • Then identify how many unshared pairs or lone pairs are on the central atom. • Each combination of shared and unshared pairs will represent a specific molecular shape. ...
Lab 11
... (Kmax) ∝ Intensity, and (iii) iphoto ∝ intensity , and based on the predictions of the Wave model Quantum model Which model better fits the data better: the wave or quantum model? Explain your answer using short concise sentences. Part 2: Predict and measure Planck’s constant h/e and the Work ...
... (Kmax) ∝ Intensity, and (iii) iphoto ∝ intensity , and based on the predictions of the Wave model Quantum model Which model better fits the data better: the wave or quantum model? Explain your answer using short concise sentences. Part 2: Predict and measure Planck’s constant h/e and the Work ...
FALL Final Review KEY
... Metallic: electron sea model (fixed positive cations and delocalized negative valence electrons) a. Covalent b. Covalent electrons shared and Ionic bonds electrons transferred 36. Positive cations are surrounded by negative anions and negative anions are surrounded by positive cations 37. If the ...
... Metallic: electron sea model (fixed positive cations and delocalized negative valence electrons) a. Covalent b. Covalent electrons shared and Ionic bonds electrons transferred 36. Positive cations are surrounded by negative anions and negative anions are surrounded by positive cations 37. If the ...
Student Expectation
... Key Concept 1: During a chemical reaction, the atoms of substances rearrange themselves into a new configuration forming new substances. The reactants (or the energy and atoms or molecules of the original substance) combine to produce products (or the energy, atoms, and molecules of the new substanc ...
... Key Concept 1: During a chemical reaction, the atoms of substances rearrange themselves into a new configuration forming new substances. The reactants (or the energy and atoms or molecules of the original substance) combine to produce products (or the energy, atoms, and molecules of the new substanc ...
Quantum Mechanics in 3
... inside the well is zero and outside the well is infinity. Then the question is how can we obtain wave function and energy of the particle inside the well. We are lucky because the wave function outside the well is ...
... inside the well is zero and outside the well is infinity. Then the question is how can we obtain wave function and energy of the particle inside the well. We are lucky because the wave function outside the well is ...
Unit 1 Notes
... Early 1800’s - alchemists had discovered new elements and needed new symbols to represent them. 1814, Swedish chemist Jons Jacob Berzelius used letters as symbols to represent elements. Because Latin was the common language of that time, many of the symbols on the modern periodic table today w ...
... Early 1800’s - alchemists had discovered new elements and needed new symbols to represent them. 1814, Swedish chemist Jons Jacob Berzelius used letters as symbols to represent elements. Because Latin was the common language of that time, many of the symbols on the modern periodic table today w ...
Holonomic quantum computation with neutral atoms
... a two-qubit gate that, along with the dynamically generated one-qubit gates, is universal. To achieve an all-geometrical implementation of quantum computation one is led to consider more sophisticated, i.e., non-Abelian, structures. This has been originally done in Ref. [6], where the so called holo ...
... a two-qubit gate that, along with the dynamically generated one-qubit gates, is universal. To achieve an all-geometrical implementation of quantum computation one is led to consider more sophisticated, i.e., non-Abelian, structures. This has been originally done in Ref. [6], where the so called holo ...
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.