內容：

We investigate the ground-state phases of ultracold gases composed of bosonic microwave-shielded polar molecules (MSPMs). Using a translational symmetry-breaking variational ansatz with Jastrow correlations, we characterize the many-body correlations arising from the large shielding core of the two-body potential in a dense gas. We show that the molecular gases are always stabilized by the shielding potential and support a self-bound gas phase and an expanding gas phase. Furthermore, analogous to liquid 4 He, we find that the condensate fraction is significantly reduced when the size of the shielding core of the two-body potential becomes comparable to the inter-molecular distance. For experimental detection, we also identify a bimodal feature in the momentum distribution. Our work invalidates the application of the Gross-Pitaevskii equation to molecular gases and establishes a universal framework to reveal the many-body correlations in dense molecular gases.

人物介紹：

易俗，寧波大學教授。2002年獲得美國佐治亞理工學院博士學位。2002年5月至2006年1月期間先后在美國佐治亞理工學院和萊斯大學從事博士后研究。2005年10月入選中國科學院“百人計劃”，2010年獲國家杰出青年科學基金資助。主要從事超冷原子分子物理、量子模擬與量子精密測量等方向的理論研究，共發表SCI學術論文80余篇。