Finite-Size Spectral Signatures of Order by Quantum Disorder: A Perspective from Anderson’s Tower of States

Author(s): Subhankar Khatua, Griffin C. Howson, Michel J. P. Gingras, and Jeffrey G. Rau Order by quantum disorder leaves distinct finite-size signatures in the exact diagonalization spectrum that are captured by an effective quantum-rotor description analogous to the Anderson tower of states. [Phys. Rev. Lett. 136, 146702] Published Wed Apr 08, 2026