PHY332 Atomic and Laser Physics AM FOX
... heavily on atomic physics, especially astrophysics, laser physics, solid-state physics, quantum information science, and chemistry. So much so, that Richard Feynman once wrote:1 If, in some cataclysm, all scientific knowledge were to be destroyed, and only one sentence passed on to the next generati ...
... heavily on atomic physics, especially astrophysics, laser physics, solid-state physics, quantum information science, and chemistry. So much so, that Richard Feynman once wrote:1 If, in some cataclysm, all scientific knowledge were to be destroyed, and only one sentence passed on to the next generati ...
Quantum Heat Engines and Refrigerators: Continuous Devices
... Our cars, refrigerators, air conditioners, lasers, and power plants are all examples of heat engines. The trend toward miniaturization has not skipped the realm of heat engines, leading to devices on the nano- or even on the atomic scale. Typically, in the practical world, all such devices operate f ...
... Our cars, refrigerators, air conditioners, lasers, and power plants are all examples of heat engines. The trend toward miniaturization has not skipped the realm of heat engines, leading to devices on the nano- or even on the atomic scale. Typically, in the practical world, all such devices operate f ...
Diamond Photonics
... • Exhibits quantum behavior at room temperature. – Weak spin-orbit coupling – Weak magnetic interactions with other spins ...
... • Exhibits quantum behavior at room temperature. – Weak spin-orbit coupling – Weak magnetic interactions with other spins ...
Momentum packet
... Note that the loaded cart lost 14 units of momentum and the dropped brick gained 14 units of momentum. Note also that the total momentum of the system (45 units) was the same before the collision as it is after the collision. Collisions commonly occur in contact sports (such as football) and racket ...
... Note that the loaded cart lost 14 units of momentum and the dropped brick gained 14 units of momentum. Note also that the total momentum of the system (45 units) was the same before the collision as it is after the collision. Collisions commonly occur in contact sports (such as football) and racket ...
Lecture 18 — October 26, 2015 1 Overview 2 Quantum Entropy
... informational standpoint. The informational statement is that we can sometimes be more certain about the joint state of a quantum system than we can be about any one of its individual parts, and this is the reason that conditional quantum entropy can be negative. This is in fact the same observation ...
... informational standpoint. The informational statement is that we can sometimes be more certain about the joint state of a quantum system than we can be about any one of its individual parts, and this is the reason that conditional quantum entropy can be negative. This is in fact the same observation ...
Paper
... = 2.612). If the atoms are fermions (see Box 1), cooling gradually brings the gas closer to being a ‘Fermi sea’ in which exactly one atom occupies each low-energy state. Creating a BEC or a Fermi sea is thus simple in principle — make a gas extremely cold. In most cases, however, quantum degeneracy ...
... = 2.612). If the atoms are fermions (see Box 1), cooling gradually brings the gas closer to being a ‘Fermi sea’ in which exactly one atom occupies each low-energy state. Creating a BEC or a Fermi sea is thus simple in principle — make a gas extremely cold. In most cases, however, quantum degeneracy ...
Abstracts of talks for the history of science conference, One hundred
... Communicating the Heisenberg relations: Niels Bohr and the forgotten Einstein-Rupp experiments In 1926, Albert Einstein collaborated with Emil Rupp on a set of experiments that were to probe the wave versus particle nature of light. The experiments have now been forgotten, even though their history ...
... Communicating the Heisenberg relations: Niels Bohr and the forgotten Einstein-Rupp experiments In 1926, Albert Einstein collaborated with Emil Rupp on a set of experiments that were to probe the wave versus particle nature of light. The experiments have now been forgotten, even though their history ...
1 Introduction - UCR Math Dept.
... email: [email protected] February 15, 2011 Abstract The Rényi entropy is a generalization of the usual concept of entropy which depends on a parameter q. In fact, Rényi entropy is closely related to free energy. Suppose we start with a system in thermal equilibrium and then suddenly divide the tem ...
... email: [email protected] February 15, 2011 Abstract The Rényi entropy is a generalization of the usual concept of entropy which depends on a parameter q. In fact, Rényi entropy is closely related to free energy. Suppose we start with a system in thermal equilibrium and then suddenly divide the tem ...
Kinetic friction Static friction
... friction fk acts to oppose the sliding motion at the point of contact between the surfaces. Magnitude of the force of kinetic friction: In general, the force of kinetic friction is found to be proportional to the magnitude of the normal force, N, or fk = kN. The constant of proportionality, k, is ...
... friction fk acts to oppose the sliding motion at the point of contact between the surfaces. Magnitude of the force of kinetic friction: In general, the force of kinetic friction is found to be proportional to the magnitude of the normal force, N, or fk = kN. The constant of proportionality, k, is ...
MOMENTUM!
... A 1.3 kg ball is coming straight at a 75 kg soccer player at 13 m/s who kicks it in the exact opposite direction at 22 m/s with an average force of 1200 N. How long are his foot and the ball in contact? answer: We’ll use Fnet t = p. Since the ball changes direction, p = m v = m (vf - v0) = 1.3 [2 ...
... A 1.3 kg ball is coming straight at a 75 kg soccer player at 13 m/s who kicks it in the exact opposite direction at 22 m/s with an average force of 1200 N. How long are his foot and the ball in contact? answer: We’ll use Fnet t = p. Since the ball changes direction, p = m v = m (vf - v0) = 1.3 [2 ...
ABSTRACT PHOTON PAIR PRODUCTION FROM A HOT ATOMIC ENSEMBLE IN THE DIAMOND CONFIGURATION
... take advantage of nonlinear interactions to produce and store non-classical states of light. These technologies will require photon sources that not only generate nonclassical light, but also resonant, narrow band light. Here we investigate a system which could be used as such a source. We take adva ...
... take advantage of nonlinear interactions to produce and store non-classical states of light. These technologies will require photon sources that not only generate nonclassical light, but also resonant, narrow band light. Here we investigate a system which could be used as such a source. We take adva ...
The Law of Momentum Conservation
... equal and opposite impulses, it follows logically that they must also experience equal and opposite momentum changes. As an equation, this can be stated as the law of momentum conservation: ...
... equal and opposite impulses, it follows logically that they must also experience equal and opposite momentum changes. As an equation, this can be stated as the law of momentum conservation: ...
More on mild continuity
... Definition 5 Let f : (X, τ ) → (Y, σ) be a function and set P Qf = Pf ∪Qf = {x ∈ X: x ∈ Pf or x ∈ Qf }, i.e. P Qf contains all points of X in which f is precontinuous or quasi-continuous. If P Qf = X and Sf is a closed subset of X, then we say that f is extremally β-continuous (= e-β-continuous). T ...
... Definition 5 Let f : (X, τ ) → (Y, σ) be a function and set P Qf = Pf ∪Qf = {x ∈ X: x ∈ Pf or x ∈ Qf }, i.e. P Qf contains all points of X in which f is precontinuous or quasi-continuous. If P Qf = X and Sf is a closed subset of X, then we say that f is extremally β-continuous (= e-β-continuous). T ...
Renormalization group
In theoretical physics, the renormalization group (RG) refers to a mathematical apparatus that allows systematic investigation of the changes of a physical system as viewed at different distance scales. In particle physics, it reflects the changes in the underlying force laws (codified in a quantum field theory) as the energy scale at which physical processes occur varies, energy/momentum and resolution distance scales being effectively conjugate under the uncertainty principle (cf. Compton wavelength).A change in scale is called a ""scale transformation"". The renormalization group is intimately related to ""scale invariance"" and ""conformal invariance"", symmetries in which a system appears the same at all scales (so-called self-similarity). (However, note that scale transformations are included in conformal transformations, in general: the latter including additional symmetry generators associated with special conformal transformations.)As the scale varies, it is as if one is changing the magnifying power of a notional microscope viewing the system. In so-called renormalizable theories, the system at one scale will generally be seen to consist of self-similar copies of itself when viewed at a smaller scale, with different parameters describing the components of the system. The components, or fundamental variables, may relate to atoms, elementary particles, atomic spins, etc. The parameters of the theory typically describe the interactions of the components. These may be variable ""couplings"" which measure the strength of various forces, or mass parameters themselves. The components themselves may appear to be composed of more of the self-same components as one goes to shorter distances.For example, in quantum electrodynamics (QED), an electron appears to be composed of electrons, positrons (anti-electrons) and photons, as one views it at higher resolution, at very short distances. The electron at such short distances has a slightly different electric charge than does the ""dressed electron"" seen at large distances, and this change, or ""running,"" in the value of the electric charge is determined by the renormalization group equation.