Fig. 1. (a)The absorption image of the anisotropic expansion dynamics in strongly interacting Fermi gas; (b) the non-equilibrium dynamical expansion behavior in different directions; (c) the evolution for the aspect ratio of the atomic cloud under different interaction regime^[2]. (a)强相互作用超冷费米气体的各向异性膨胀吸收成像图; (b)原子团不同方向的非平衡动力学膨胀行为; (c)不同相互作用下原子团的纵横比大小演化图^[2]

Fig. 2. Scale invariant expansion of a resonantly interacting Fermi gas compared with the non-interacting Fermi gas^[34]. 幺正费米气体和无相互作用费米气体的标度不变展开动力学^[34]

Fig. 3. Conformal symmetry breaking in the expansion for a Fermi gas near a Feshbach resonance. Top: BCS region; Center: unitary region; Bottom: BEC region^[34]. Feshbach共振点附近费米气体膨胀动力学的对称性破缺行为, 从上到下依次为BCS区域、幺正区域和BEC区域^[34]

Fig. 4. The Efimovian expansion dynamics: (a) and (b) are the evolution of the harmonic trap frequency; (c) the prediction of the Efimovian expansion dynamics; (d) and (e) are the experimental observation of the Efimovian expansion in non-interacting Fermi gas and unitary Fermi gas respectively^[16]. Efimovian膨胀动力学示意图　(a), (b)原子气体所处谐振子阱频率的变化过程; (c)Efimovian 膨胀动力学的理论预测; (d), (e)分别代表无相互作用费米气体和强相互作用费米气体的Efimovian 膨胀动力学的实验观测结果^[16]

Fig. 5. The universality of the Efimovian expansion dynamics: (a) The Efimovian expansion with different interaction regime; (b) the Efimovian expansion with different atoms' number and temperature; (c) and (d) are the universal dimensionless Efimovian expansions^[16]. Efimovian膨胀动力学的普适性　(a) Efimovian 膨胀动力学与原子间相互作用的关系; (b) Efimovian 膨胀动力学与原子数目、温度间的关系; (c), (d)无量纲化后的普适Efimovian 动力学膨胀图^[16]

Fig. 6. The experimental observation of dynamical super Efimovian expansion. (a), (b) and (c), (d) are the mean axial cloud size versus the expansion time and the dimensionless axial mean square cloud size versus the dimensionless time in the unitary Fermi gas and ideal Fermi gas, respectively^[42]. 超级Efimovian 膨胀动力学实验结果　(a)和(c)分别表示幺正费米气体和无相互作用费米气体的超级Efimov 动力学效应; (b)和(d)表示在时间双对数标度下相应原子团大小的振荡行为^[42]

Fig. 7. The axial potential (internal) energy ratio versus expansion time (a) and the axial energy scaling versus dimensionless time (b) for the super Efimovian expansion^[42]. 超级Efimovian 膨胀过程中的内能和势能在时间(a)及其双对数标度(b)下的变化示意图^[42]