We report on the observation of a high-density, band insulating state in a three-dimensional optical lattice clock. Filled with a nuclear-spin polarized degenerate Fermi gas of 87Sr, the 3D lattice has one atom per site in the ground motional state, thus guarding against frequency shifts due to contact interactions. At this high density where the average distance between atoms is comparable to the probe wavelength, standard imaging techniques suffer from large systematic errors. To spatially probe frequency shifts in the clock and measure thermodynamic properties of this system, accurate imaging techniques at high optical depths are required. Using a combination of highly saturated fluorescence and absorption imaging, we confirm the density distribution in our 3D optical lattice in agreement with a single spin band insulating state. Combining our clock platform with this high filling fraction opens the door to studying new classes of long-lived, many-body states arising from dipolar interactions.
State-dependent interactions in ultracold $^{174}$Yb probed by optical clock spectroscopy
本文报道了超冷$^{174}$ Yb玻色子在三维光晶格中散射特性的测量。原子莫特绝缘体中的占位是解决了高精度光谱上的超箭光学时钟过渡。导出了$^{174}$ Yb原子在基态$^1$ S $_0$和亚稳态$^3$ P $_0$的不同碰撞通道中的散射长度和损失率系数.这些研究为未来量子技术应用中双电子原子的实验研究设定了重要的限制。
Realization of a fast triple-magic all-optical qutrit in strontium-88
Max-Planck-Institut für Quantenoptik（马克斯·普朗克量子光学研究所）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；Fakultät für Physik, Ludwig-Maximilians-Universität（路德维希-马克西米利安大学物理学院）
Fast Nondestructive Readout for High-Clock-Rate Atom Array Quantum Processor
Hefei National Research Center for Physical Sciences at the Microscale and Department of Modern Physics, New Cornerstone Science Laboratory, University of Science and Technology of China（中国科学院合肥物质科学研究院近代物理研究所、新Cornerstone科学实验室、中国科学技术大学）
Isotope-agnostic motional ground-state cooling of neutral Yb atoms
Ludwig-Maximilians-Universität（慕尼黑大学）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；Max-Planck-Institut für Quantenoptik（马克斯·普朗克量子光学研究所）
