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4

What are those qubit in essence? Are they some kind of ultimate thing that build up our world? Yes. In the string-net picture of elementary particles, the qubits are the ultimate things that build up our world. We live inside a quantum qubit world (ie a quantum information world) (see http://blog.sciencenet.cn/blog-1116346-736093.html ) Such an emergence ...

0

Can we say that if the mass gap of the anyon fractional exicitations $\Delta$ are larger than the thermal energy $E_H=k_b T$ (temperature at $T$), $$\Delta >> E_H=k_b T$$ then we still can observe topological order at small but finite temperature.(?)

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See eqn. 3.70 in my paper: Topological Orders and Edge Excitations in FQH States , Advances in Physics 44, 405 (1995). ( http://arxiv.org/abs/cond-mat/9506066. )

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