The ground state for a quantum Hall system on a torus with fractional filling factor can be classified by the Chern number, which is why the Hall conductance is quantized. Is there another method or classification one can use to distinguish states?
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cosmology - The difference between comoving and proper distances in defining the observable universe"The radius of the observable universe is estimated to be about 46.5 Gly." If I understand correctly, it means the most distant ob...
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Are C1, C2 and C3 connected in parallel, or C2, C3 in parallel and C1 in series with C23? Btw it appeared as a question in the basic physics...
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Everyone always talks about the efficiency of their appliances. I was wondering if everything was 100% efficient at heating its surroundings...
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