تقرير
Instantons and the quantum bound to chaos
| العنوان: | Instantons and the quantum bound to chaos |
|---|---|
| المؤلفون: | Sadhasivam, Vijay Ganesh, Meuser, Lars, Reichman, David R., Althorpe, Stuart C. |
| سنة النشر: | 2022 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Physics - Chemical Physics |
| الوصف: | We investigate why the Lyapunov exponents $\lambda$ of out-of-time-ordered correlators (OTOCs) satisfy a universal bound $\lambda < 2 \pi k_B T/{\hbar}$ by probing imaginary-time path-integral space using ring-polymer molecular dynamics (RPMD) for a barrier-crossing model. We find that the RPMD OTOC satisfies the same bound as the quantum OTOC, which is caused by the stability of quantum thermal fluctuations around the instanton on the barrier. We expect that similar instantons (or other delocalised structures) will be found in many other systems with exponentially growing OTOCs. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2212.10202 |
| رقم الأكسشن: | edsarx.2212.10202 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |