Report
Scale invariance of a spherical unitary Fermi gas
| العنوان: | Scale invariance of a spherical unitary Fermi gas |
|---|---|
| المؤلفون: | Wang, Lu, Yan, Xiangchuan, Min, Jing, Sun, Dali, Xie, Xin, Peng, Shi-Guo, Zhan, Mingsheng, Jiang, Kaijun |
| المصدر: | Phys. Rev. Lett. 132, 243403 (2024), Editors' Suggestion |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Quantum Gases, Physics - Atomic Physics |
| الوصف: | A unitary Fermi gas in an isotropic harmonic trap is predicted to show scale and conformal symmetry that have important consequences in its thermodynamic and dynamical properties. By experimentally realizing a unitary Fermi gas in an isotropic harmonic trap, we demonstrate its universal expansion dynamics along each direction and at different temperatures. We show that as a consequence of SO(2,1) symmetry, the measured release energy is equal to that of the trapping energy. We further observe the breathing mode with an oscillation frequency twice the trapping frequency and a small damping rate, providing the evidence of SO(2,1) symmetry. In addition, away from resonance when scale invariance is broken, we determine the effective exponent $\gamma$ that relates the chemical potential and average density along the BEC-BCS crossover, which qualitatively agrees with the mean field predictions. This work opens the possibility of studying non-equilibrium dynamics in a conformal invariant system in the future. Comment: 15 pages and 10 figurs |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2311.15779 |
| رقم الانضمام: | edsarx.2311.15779 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |