تقرير
Entanglement Hamiltonian in the non-Hermitian SSH model
| العنوان: | Entanglement Hamiltonian in the non-Hermitian SSH model |
|---|---|
| المؤلفون: | Rottoli, Federico, Fossati, Michele, Calabrese, Pasquale |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter High Energy Physics - Theory Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Statistical Mechanics, High Energy Physics - Theory |
| الوصف: | Entanglement Hamiltonians provide the most comprehensive characterisation of entanglement in extended quantum systems. A key result in unitary quantum field theories is the Bisognano-Wichmann theorem, which establishes the locality of the entanglement Hamiltonian. In this work, our focus is on the non-Hermitian Su-Schrieffer-Heeger (SSH) chain. We study the entanglement Hamiltonian both in a gapped phase and at criticality. In the gapped phase we find that the lattice entanglement Hamiltonian is compatible with a lattice Bisognano-Wichmann result, with an entanglement temperature linear in the lattice index. At the critical point, we identify a new imaginary chemical potential term absent in unitary models. This operator is responsible for the negative entanglement entropy observed in the non-Hermitian SSH chain at criticality. Comment: 21 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2402.04776 |
| رقم الأكسشن: | edsarx.2402.04776 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |