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Main postulates
Main postulates

... swapped. Particles with wavefunctions symmetric under exchange are called bosons; The wave function of a system of identical half-integer spin particles changes sign when two particles are swapped. Particles with wavefunctions anti-symmetric under exchange are called fermions. (3) The Pauli exclusio ...
The Origin of Inertia
The Origin of Inertia

... Center in Palo Alto and the California State University in Long Beach. That study found the more general result that the relativistic equation of motion could be derived from consideration of the Poynting vector of the Zero-Point Field in accelerated reference frames. Again, within the context (and ...
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Effective Quantum Gravity and Inflation
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... M06Q.3 - Two Interacting Particles Problem Consider two particles of mass m moving in one dimension. Particle 1 moves freely, while particle 2 experiences a harmonic potential V (x2 ) = 21 mω 2 x22 . The two particles interact via a delta function potential Vint (x12 ) = λδ(x12 ), with x12 ≡ x1 − x2 ...
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... Separating to Basis States Basis State: a quantum state with a well-defined particle property (position, momentum, angle, angular momentum, polarization, energy, etc.) A set of basis states is measured for each dimension. A basis state for one measurement is not necessarily a basis for another. A b ...
Photon gas as a classical medium
Photon gas as a classical medium

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... • Which particles are truly elementary? • Do we understand why particles have their observed properties? • What can we calculate? • Are the calculations reliable? • Can we compare them with experiment? • Is there an underlying theory that explains everything? ...
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Quantum Mechanics from Periodic Dynamics: the bosonic case

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... in the early universe/when the temperature was very high particles collided with antiparticles to create photons and the photons materialized into particleantiparticle pairs; As the temperature dropped, the second process became impossible and so the universe was left with (the small number of exces ...
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The Step Function – Getting Started

... In this problem we have four (complex) free parameters (A and B in each region) and two boundary conditions. This means that after solving the boundary condition equations we will still be left with two free parameters (such as A and B in one region). As was true with the free particle case, one of ...
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Propagator

In quantum mechanics and quantum field theory, the propagator gives the probability amplitude for a particle to travel from one place to another in a given time, or to travel with a certain energy and momentum. In Feynman diagrams, which calculate the rate of collisions in quantum field theory, virtual particles contribute their propagator to the rate of the scattering event described by the diagram. They also can be viewed as the inverse of the wave operator appropriate to the particle, and are therefore often called Green's functions.
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