New answers tagged spin-statistics
1
Okay, my comments are getting too much, so I will answer.
If I understand your question correctly it says this:
Papers show that the non-planar Ising model (finding its ground state) is NP complete
On the other hand, finding the eigenvalues of a matrix is polynomial.
So how do these points reconcile?
The important point here is in the size of the input. ...
0
There's no related exception for tachyons. Tachyons' statistics must be determined a priori. Most typically, tachyons have to be bosons – and under certain additional assumptions, they have to be scalar (spin-zero) bosons. They differ from massive bosons just by the fact that the mass term $m^2\phi^2/2$ has the opposite sign – opposite sign of their $m^2$.
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