Campbell Gretchen K, Mun Jongchul, Boyd Micah, Medley Patrick, Leanhardt Aaron E, Marcassa Luis G, Pritchard David E, Ketterle Wolfgang
MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Science. 2006 Aug 4;313(5787):649-52. doi: 10.1126/science.1130365.
Microwave spectroscopy was used to probe the superfluid-Mott insulator transition of a Bose-Einstein condensate in a three-dimensional optical lattice. By using density-dependent transition frequency shifts, we were able to spectroscopically distinguish sites with different occupation numbers and to directly image sites with occupation numbers from one to five, revealing the shell structure of the Mott insulator phase. We used this spectroscopy to determine the onsite interaction and lifetime for individual shells.
微波光谱学被用于探测三维光学晶格中玻色-爱因斯坦凝聚体的超流-莫特绝缘体转变。通过利用与密度相关的跃迁频率偏移，我们能够通过光谱区分具有不同占据数的格点，并直接成像占据数从一到五的格点，揭示了莫特绝缘体相的壳层结构。我们利用这种光谱学来确定各个壳层的在位相互作用和寿命。
