@inproceedings {738,
	title = {Entanglement spectrum and entropy of the 1D quantum q-state clock model via exact diagonalization and density matrix renormalization group},
	booktitle = {Proceedings of the 44th Samahang Pisika ng Pilipinas Physics Conference},
	year = {2026},
	month = {17-20 Jun 2026},
	pages = {SPP-2026-PC-02},
	address = {Los Ba{\~n}os},
	abstract = {This work studies the entanglement spectrum and R{\'e}nyi entropy of the one-dimensional quantum q-state clock model for <em>q</em> = 2 to <em>q</em> = 6 using exact diagonalization (ED) and the density matrix renormalization group (DMRG), implemented with the conserved modular charge <em>k</em> for symmetry resolution. For all <em>q</em> values, the entanglement spectra display a mapping between sectors labeled by <em>k</em> and <em>q</em>-<em>k</em>, with the ground state of the entanglement Hamiltonian consistently located in the neutral-charge sector <em>k</em> = 0. Furthermore, the R{\'e}nyi entropy follows an ordered structure Sα(k = 0) < Sα(k=1,q-1) < ..., with the largest entropy contributions occurring at <em>k</em> = <em>q</em>/2 for even <em>q</em> and <em>k</em> = (<em>q</em> {\textpm} 1)/2 for odd <em>q</em>. These results suggest an effectively local entanglement Hamiltonian consistent with the Bisognano{\textendash}Wichmann theorem and the area law, despite the global Z<em>q</em> symmetry.},
	url = {https://proceedings.spp-online.org/article/view/SPP-2026-PC-02},
	author = {Winonna Kylie C. Chua and Noel M. Lamsen}
}