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Today in Physics 218: the blue sky
Today in Physics 218: the blue sky

Physics - Electric Fields
Physics - Electric Fields

Quantum phase transitions in atomic gases and condensed matter
Quantum phase transitions in atomic gases and condensed matter

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... to zero, one can then write as in Nelson (1966) and Paul and Baschnagel (1999), that dxdt+ ≃ xn+1ǫ−xn and dxdt− ≃ xn −xǫ n−1 , where ǫ denotes the difference in time t, and d indicates the infinitesimal differential operator. In the area of finance, the so called Brownian motion is a very common way ...
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PHYS 1443 – Section 501 Lecture #1

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(before 25/08/2010). Coulomb`s law From Wikipedia, the free

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Problem 5.1 An electron with a speed of 8 × 10 6 m/s is projected
Problem 5.1 An electron with a speed of 8 × 10 6 m/s is projected

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An equipotential surface is a surface on which the

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Chapter 26

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Lecture 1: Introduction to EM 1

... 3. [xx] next to the formula indicates units. 4. Matlab logo: ...
ELECTRIC CHARGE, FORCE AND FIELD
ELECTRIC CHARGE, FORCE AND FIELD

... generate a TORQUE, τ. From the diagram, the torque tends to rotate the dipole so as to reduce θ - i.e., to align the dipole axis with the field. Convention: Positive torque tends to increase θ (anticlockwise rotation) Negative torque tends to decrease θ (clockwise rotation) ...
Chapter 16
Chapter 16

Lecture 21
Lecture 21

... If we put a charge q3  2nC at point P, then the force is : r r F  q3 E P  (2nC)(9.60iˆ  3.16 ˆj )N /C  (19.20iˆ  6.32 ˆj )  10 9 N r ...
ELECTROGRAVITATION AS A UNIFIED FIELD
ELECTROGRAVITATION AS A UNIFIED FIELD

... This would include neutrons, bosons, and particles exhibiting zero charge in general. Mass would then be the result of standing wave fields. The source for all this energy would come from the same place as the energy came from that initiated the Big Bang but due to the geometry of the electron, inst ...
Slide 101
Slide 101

... 4. Consider a system of particles that are indistinguishable but for the purposes of constructing wavefunctions can be numbered from 1 to N. These particles are simultaneously confined in some potential. Each of them could be in any energy state from the selection {a, b, c, ... n}. If any one of the ...
TOPIC 4.2: ELECTRIC FIELDS
TOPIC 4.2: ELECTRIC FIELDS

< 1 ... 311 312 313 314 315 316 317 318 319 ... 661 >

Aharonov–Bohm effect

The Aharonov–Bohm effect, sometimes called the Ehrenberg–Siday–Aharonov–Bohm effect, is a quantum mechanical phenomenon in which an electrically charged particle is affected by an electromagnetic field (E, B), despite being confined to a region in which both the magnetic field B and electric field E are zero. The underlying mechanism is the coupling of the electromagnetic potential with the complex phase of a charged particle's wavefunction, and the Aharonov–Bohm effect is accordingly illustrated by interference experiments.The most commonly described case, sometimes called the Aharonov–Bohm solenoid effect, takes place when the wave function of a charged particle passing around a long solenoid experiences a phase shift as a result of the enclosed magnetic field, despite the magnetic field being negligible in the region through which the particle passes and the particle's wavefunction being negligible inside the solenoid. This phase shift has been observed experimentally. There are also magnetic Aharonov–Bohm effects on bound energies and scattering cross sections, but these cases have not been experimentally tested. An electric Aharonov–Bohm phenomenon was also predicted, in which a charged particle is affected by regions with different electrical potentials but zero electric field, but this has no experimental confirmation yet. A separate ""molecular"" Aharonov–Bohm effect was proposed for nuclear motion in multiply connected regions, but this has been argued to be a different kind of geometric phase as it is ""neither nonlocal nor topological"", depending only on local quantities along the nuclear path.Werner Ehrenberg and Raymond E. Siday first predicted the effect in 1949, and similar effects were later published by Yakir Aharonov and David Bohm in 1959. After publication of the 1959 paper, Bohm was informed of Ehrenberg and Siday's work, which was acknowledged and credited in Bohm and Aharonov's subsequent 1961 paper.Subsequently, the effect was confirmed experimentally by several authors; a general review can be found in Peshkin and Tonomura (1989).
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