Speaker
Description
We explore an integrable deformation of the spin-1/2 Heisenberg spin chain by leveraging its inherent conserved quantities. Starting with the isotropic (XXX) model, we identify the scalar chirality operator as one of its higher conserved charges. This operator, which breaks both time-reversal and parity symmetries, serves as the deformation term. Adding this chiral term to the Hamiltonian produces a new, integrable model whose critical properties are the central focus of this work. We present the model's exact solution via the thermodynamic Bethe ansatz and analyze its critical phenomena. Using entanglement entropy, finite-size scaling, and concepts from symmetry-enriched conformal field theory (CFT), we establish that the chiral deformation drives the system to a c=1 critical point. The low-energy excitations are characterized through the dynamic spin structure factor. Such a scalar chirality operator can be experimentally created via a chiral a cavity. Finally, the presentation concludes with a summary of open problems in the field.
| Session Selection | Condensed Matter |
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