Recent content by ewilibrium

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    Raising and lowering operators for spin

    I think that is a Math method. Example: angular momentum: After "operate" with Math signals, Lz will be raised or lowered. (with operation L+=Lx+iLy) -- If define L \pm = L_x \pm iL_y When comute them: [L_z ,L \pm ] = ... = \pm \hbar (L_x \pm iL_y ) (Griffiths D.J_Quantum Mechanics...) If...
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    Quantum number and wave vector

    Thanks you very much! Then I can say n,l,m include posittion of the particle?
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    Quantum number and wave vector

    Hello! Can you help me a question? -The particle was describeb by 3 quantum number: n,l,m (not consider the spin). -But in Solid books, writer often use wave vector \vec{k} to describe state of particle. That is kx, ky and kz with 3 dimension of coordinate. Then, what relation with 3 quantum...
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    Energy Band in Solids: What Is the Essential Phenomenon?

    Thank Gokul! But i think: If N (~10^23) atom come close, that is not same as your example. A orbital 2s of one atom can "overlap" with just several other atom. (Not with all atom) I think that isn't the Identicle Particle in Quantum Mechanics. I think that is Second Quantization, that is a...
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    Energy Band in Solids: What Is the Essential Phenomenon?

    Hello! The Energy Band has N energy level (if system has N atomic). But..i don't know what electron take what level? Example: If atomics so far,the electron in orbital 2s of atomic i th and the electron in orbital 2s of atomic j th (i difficult j) is same energy level. When they so near, and...
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