By V. Okatev and others

We develop an approach for characterizing non-local quantum correlations in spin systems with exactly or nearly degenerate ground states. Starting with linearly independent degenerate eigenfunctions calculated with exact diagonalization we generate a finite set of their random linear combinations with Haar measure, which guarantees that these combinations are uniformly distributed... Show more

October 1, 2024

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Exploring entanglement in finite-size quantum systems with degenerate ground state

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