标题： 极性分子的费米简并气体 显示英文标题

标题： A Fermi Degenerate Gas of Polar Molecules

摘要： 长期以来，人们一直期望分子和量子科学领域的广泛现象能够通过分子的量子简并气体来实现。然而，超冷分子之所以诱人正是因为其复杂性，这在过去十年里使达到简并状态成为一个突出的实验挑战。我们现在报告了钾-铷（KRb）超冷极性分子费米简并气体的产生。通过在铷玻色-爱因斯坦凝聚体和钾费米气体的深度简并混合物中的相干绝热结合，我们在低于费米温度0.3倍的温度下生成了这些分子。我们探索了这种反应性气体的性质，并展示了简并如何抑制化学反应，从而使极性分子的长寿费米简并气体成为现实。 显示英文摘要

摘要： It has long been expected that quantum degenerate gases of molecules would open access to a wide range of phenomena in molecular and quantum sciences. However, the very complexity that makes ultracold molecules so enticing has made reaching degeneracy an outstanding experimental challenge over the past decade. We now report the production of a Fermi degenerate gas of ultracold polar molecules of potassium--rubidium (KRb). Through coherent adiabatic association in a deeply degenerate mixture of a rubidium Bose-Einstein condensate and a potassium Fermi gas, we produce molecules at temperatures below 0.3 times the Fermi temperature. We explore the properties of this reactive gas and demonstrate how degeneracy suppresses chemical reactions, making a long-lived degenerate gas of polar molecules a reality.