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| bio | website | |
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| age | ||
| visits | member for | 1 year, 2 months |
| seen | May 14 at 14:58 | |
| stats | profile views | 20 |
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May 10 |
awarded | Tumbleweed |
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May 3 |
asked | Excitation probability for 2 Level Atom |
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Mar 5 |
asked | Toric Code and Random Bond Ising Model |
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Feb 13 |
comment |
Exact Beta Functions in Statistical Mechanics Okay:) That's certainly true. Though I would be happy to find a non-standard example that also has a phase transition (not like Ising 1D) at some point in parameter space |
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Feb 13 |
asked | Exact Beta Functions in Statistical Mechanics |
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Dec 28 |
awarded | Scholar |
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Dec 28 |
accepted | Freedom in the Choice of a Beta Functions in RG |
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Dec 17 |
asked | Freedom in the Choice of a Beta Functions in RG |
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Oct 2 |
awarded | Supporter |
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Oct 1 |
comment |
Quantum Mechanics in terms of *-algebras Thirring's exposition looks nice and seems to be a nice start. But I think he's not talking about partial trace, purification, etc. |
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Oct 1 |
asked | Quantum Mechanics in terms of *-algebras |
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May 25 |
awarded | Student |
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Feb 24 |
comment |
Reduction of a sum to the first Brillouin zone in a band structure calculation Ok, this may help: www-brs.ub.ruhr-uni-bochum.de/netahtml/HSS/Diss/IsmerJanPeter/… This is the reference I'm using. I'm refering to section 2.4 on charge density waves, page 32. thanks. |
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Feb 23 |
comment |
Reduction of a sum to the first Brillouin zone in a band structure calculation Ok. To let's assume for simplicity that U is real. So that we don't have to worry about the difficulties you are describing. So replace U* by U everywhere |
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Feb 23 |
comment |
Reduction of a sum to the first Brillouin zone in a band structure calculation Note that the sum in the original hamiltonian is NOT restricted to the first Brillouin zone, while the sum in the Hamiltonian given in form a "quadratic form" is just over the first Brillouin zone. The model describes a charge density wave. The condition on the energies is the so-called nesting condition. |
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Feb 23 |
asked | Reduction of a sum to the first Brillouin zone in a band structure calculation |
