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ENGINEERING OPTICS WITH
ENGINEERING OPTICS WITH

Matter wave interferences of potassium molecules and the influence
Matter wave interferences of potassium molecules and the influence

Chapter 14  Interference and Diffraction
Chapter 14 Interference and Diffraction

pdf
pdf

... probe these atomic gases. In the first case, we use an auto-correlation technique to study the interference pattern produced by a gas of atoms, slightly above the Bose-Einstein condensate transition temperature. A moving optical lattice is used to split and recombine the single particle atomic wavef ...
full text - Ghent University Academic Bibliography
full text - Ghent University Academic Bibliography

... periodiek in een CLC, dat veroorzaakt hoge reflecties voor golflengtes ongeveer even lang als de pitch. Het golflengte gebied waarin hoge reflecties optreden staat bekend als de “bandgap” van het CLC. Zulke “zelf-vormende spiegels” maken het mogelijk om optische componenten met een lage kostprijs te ...
Outline For Provisional Patent Application
Outline For Provisional Patent Application

... throughout the entire body. It follows that irradiation from the body also is associated with polarization relaxations and changes within the entire body. It then follows that if the exact field pattern emitted by the body is precisely returned to the body, exactly opposite polarizations are produce ...
Quantum networking with single ions and single photons interfaced in free space
Quantum networking with single ions and single photons interfaced in free space

Paper
Paper

$doc.title

... In this case, all light rays that emerge from the slit are approximately parallel to each other. For a diffraction pattern to appear on the screen, a convex lens is placed between the slit and screen to provide convergence of the light rays. 14.5 Single-Slit Diffraction In our consideration of Young ...
Optics and Quantum Electronics
Optics and Quantum Electronics

... states with two different time scales (300 µs and 1 s respectively). When it is locked, the in-loop integrated rms phase noise is 0.38π radians measured from 1 Hz to 1 MHz. This is equivalent to 570 as rms phase jitter from 1 Hz to 1 MHz. To our knowledge this is the lowest reported phase jitter bet ...
High School Students` Conceptual Coherence of Qualitative
High School Students` Conceptual Coherence of Qualitative

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Electromagnetic oscillations of the Earth`s upper atmosphere (review)

ELECTROMAGNETIC WAVE PROPAGATION
ELECTROMAGNETIC WAVE PROPAGATION

... practical difficulties of using EM energy for communication purposes also increase as frequency increases, until finally it can no longer be used. As communication methods improve, the limit to usable frequency has been pushed higher. Today communication satellites use frequencies near 14 GHz. This ...
[pdf]
[pdf]

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An On-Chip Atom Interferometer Using a Bose

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Complete characterization of a spatiotemporally

GRAVITATIONAL WAVE PHYSICS
GRAVITATIONAL WAVE PHYSICS

... two particles in free fall. If we assume two particles moving freely along geodesics of a curved spacetime with coordinates xµ (τ ) and xµ (τ ) + ξ µ (τ ) (for a given value of the proper time τ , ξ µ (τ ) is the displacement vector connecting the two events) it can be shown that, in the ...
Storing and processing optical information with ultraslow light in Bose-Einstein... Zachary Dutton and Lene Vestergaard Hau
Storing and processing optical information with ultraslow light in Bose-Einstein... Zachary Dutton and Lene Vestergaard Hau

µ = / F c
µ = / F c

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Quantum Interference of Unpolarized Single Photons

New rapidly wavelength-swept light sources for optical coherence
New rapidly wavelength-swept light sources for optical coherence

Parametric Spatio-Temporal Control of Focusing
Parametric Spatio-Temporal Control of Focusing

instability of excitation waves induced by electrical fields
instability of excitation waves induced by electrical fields

SIMG-303-20033 Solution Set #5
SIMG-303-20033 Solution Set #5

Core Idea PS4 - National Science Teachers Association
Core Idea PS4 - National Science Teachers Association

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Coherence (physics)

In physics, two wave sources are perfectly coherent if they have a constant phase difference and the same frequency. It is an ideal property of waves that enables stationary (i.e. temporally and spatially constant) interference. It contains several distinct concepts, which are limiting cases that never quite occur in reality but allow an understanding of the physics of waves, and has become a very important concept in quantum physics. More generally, coherence describes all properties of the correlation between physical quantities of a single wave, or between several waves or wave packets. Interference is nothing more than the addition, in the mathematical sense, of wave functions. A single wave can interfere with itself, but this is still an addition of two waves (see Young's slits experiment). Constructive or destructive interferences are limit cases, and two waves always interfere, even if the result of the addition is complicated or not remarkable.When interfering, two waves can add together to create a wave of greater amplitude than either one (constructive interference) or subtract from each other to create a wave of lesser amplitude than either one (destructive interference), depending on their relative phase. Two waves are said to be coherent if they have a constant relative phase. The amount of coherence can readily be measured by the interference visibility, which looks at the size of the interference fringes relative to the input waves (as the phase offset is varied); a precise mathematical definition of the degree of coherence is given by means of correlation functions. Spatial coherence describes the correlation (or predictable relationship) between waves at different points in space, either lateral or longitudinal. Temporal coherence describes the correlation between waves observed at different moments in time. Both are observed in the Michelson–Morley experiment and Young's interference experiment. Once the fringes are obtained in the Michelson–Morley experiment, when one of the mirrors is moved away gradually, the time for the beam to travel increases and the fringes become dull and finally are lost, showing temporal coherence. Similarly, if in Young's double slit experiment the space between the two slits is increased, the coherence dies gradually and finally the fringes disappear, showing spatial coherence.
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