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دانلود رایگان کتاب , Introduction to Solid State Theory

دانلود رایگان کتاب  Introduction to Solid State Theory

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This is a 3rd year undergraduate course which only requires a good working
knowledge of quantum mechanics. It does not use or introduce methods of
many-body theory.
1.1 High-energy physics vs. solid state physics
The essential difference between the goals of high-energy physics and solid state
physics can be viewed in the following manner:
• In high-energy physics we know the correct model (the so called standard
model) to describe nature up to an energy scale of at least O(100Gev).
What we are looking for is the correct fundamental model up to the Planck
scale O(1019 Gev) where we know that the standard model breaks down and gravity needs to be quantized as well (in a way currently unknown).
One can also state this by saying that we know an effective low-energy theory (well, of O(100Gev)) of an unknown grand unified theory that we try to find using experiments and theoretical considerations.
• In solid state physics the fundamental Hamiltonian describing nuclei and
electrons with a Coulomb interaction is perfectly well known. What we are interested in here is to find the emergent behavior of many (meaning at least of order 1000) constituents at low energies of order room temperature O (20mev).

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