Recent content by ewilibrium
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Graduate 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...- ewilibrium
- Post #4
- Forum: Quantum Physics
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Graduate Quantum number and wave vector
Thanks you very much! Then I can say n,l,m include posittion of the particle?- ewilibrium
- Post #4
- Forum: Quantum Physics
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Graduate 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...- ewilibrium
- Thread
- Quantum Quantum number Vector Wave
- Replies: 4
- Forum: Quantum Physics
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Undergrad 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...- ewilibrium
- Post #8
- Forum: Atomic and Condensed Matter
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Undergrad 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...- ewilibrium
- Post #6
- Forum: Atomic and Condensed Matter