TG4.1 Annual Mini-Workshop

Wednesday 17 Sept 2025, 09:15 → 16:30 Asia/Taipei

General Building III/Room-512 - Meeting (NTHU)

1 Welcome

Speaker: Chia-Min Chung (NYCU)

2 Classical Spin–Orbital Kitaev Models from Rydberg Atom Arrays

We investigate an exactly solvable spin-orbital model that serves as a classical analogue of the celebrated Kitaev honeycomb model, describing interacting Rydberg atoms on the ruby lattice. Exploiting both its local and nonlocal symmetries, we derive the exact partition function and the static structure factor. A mapping between $S=3/2$ models on the honeycomb lattice and kagome spin Hamiltonians enables us to interpret its thermodynamic properties in terms of a classical kagome spin ice. By partially breaking the symmetries associated with line operators, we uncover a model hosting immobile excitations—classical fractons—alongside a ground-state degeneracy that grows exponentially with system length. Finally, we construct a continuum description that reveals the underlying gauge structure and conserved charges, and discuss extensions of our framework to other lattices and higher-spin systems.

Speaker: Dr Fabrizio Oliviero (NCTS)

3 Duality and quantum many-body scars

TBA

Speaker: Weslei Fontana (NTHU)

10:30 Coffee break

4 TBA

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Speaker: Ragab Abdelghany (National Chung Hsing University)

5 TBA

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Speaker: TBA TBA (TBA)

12:00 Lunch

6 TBA

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Speaker: TBA TBA (TBA)

7 TBA

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14:30 Coffee break

8 TBA

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Speaker: TBA TBA (TBA)

9 TBA

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Speaker: TBA TBA (TBA)