New answers tagged spin-models
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Constructing a gapped family of Hamiltonians in the trivial paramagnet
Let us label the states using the eigenstates of the paul-X operator $|\pm\rangle$. The ground states of $H_0$ and $H_1$ are, respectively $|-++++\ldots\rangle$ and $|+-+++\ldots\rangle$. The state ...
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