Weinberg Lectures On Quantum Mechanics

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Lectures On Quantum Mechanics, Jean-Louis Basdevant
lectures on quantum mechanics, jean-louis basdevant
Language: english
PDF pages: 322, PDF size: 5.48 MB
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Lecture Notes Quantum Mechanics
lecture notes quantum mechanics
We say that a particle has spin s if its inner degree of freedom is described by a representation of the rotations group of dimension 2s +For example, ”spin 1 ” can be described by a representation 2 of dimension 2, and ”spin 1” can be described by a representation of dimensionIn order to make this abstract statement clearer we will look at several examples. • •

Language: english
PDF pages: 267, PDF size: 2.02 MB
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Lecture Notes Quantum Mechanics
lecture notes quantum mechanics
Language: english
PDF pages: 265, PDF size: 2.71 MB
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Lecture Notes Quantum Mechanics Part
lecture notes quantum mechanics part
ˆ Thus the time-independent Schr¨dinger equation can be written as the eigenvalue equation of operator H o ˆ Hψ = Eψ which is the same as what we met in the introduction. And the expectation value of the total energy is ∫ ∫ ∫ 2 2 ˆ ⟨H⟩ = ψ ∗ Hψdx = E |ψ| dx = E |Ψ| dx = E (Notice that the normalization of Ψ entails the normalization of ψ.) Moreover, ( ) ( ) ˆ ˆ ˆ ˆ ˆ H 2 ψ = H Hψ = H (Eψ) = E Hψ = E 2 ψ and hence ⟨ 2⟩ H = So the variance of H is ⟨ ⟩ 2 2 σH = H 2 − ⟨H⟩ = E 2 − E 2 = 0 But remember, if σ = 0.

Language: english
PDF pages: 250, PDF size: 2.72 MB
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Lectures On Quantum Mechanics
lectures on quantum mechanics
.We expose the Schr¨dinger quantum mechanics with traditional applications to Hydrogen atom: o the calculation of ., the Heiseno berg representation, the selection rules, the calculation of quantum and classical scattering of light (Thomson’s cross section), photoeffect (Sommerfeld’s cross section), quantum and classical scattering of electrons (Rutherford’s cross section), normal. theoretical concepts: the introduction of the quantum stationary states, charge density and electric current density, quantum magnetic moment, electron spin and spin.

Language: english
PDF pages: 231, PDF size: 1.04 MB
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