An effective quantum rotor model connects finite-size energy splittings seen in exact diagonalization to the ObQD selection energy scale, allowing detection of quantum-selected order in one-, two-, and three-dimensional frustrated spin models.
Fazekas,Lecture Notes on Electron Correlation and Mag- netism(World Scientific, New Jersey, 1999)
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Finite-Size Spectral Signatures of Order by Quantum Disorder: A Perspective from Anderson's Tower of States
An effective quantum rotor model connects finite-size energy splittings seen in exact diagonalization to the ObQD selection energy scale, allowing detection of quantum-selected order in one-, two-, and three-dimensional frustrated spin models.