Optical Manipulation of Spin States in Ultracold Magnetic Atoms via an Inner-Shell Hz Transition
arxiv(2024)
摘要
Lanthanides, like erbium and dysprosium, have emerged as powerful platforms
for quantum-gas research due to their diverse properties, including a
significant large spin manifold in their absolute ground state. However,
effectively exploiting the spin richness necessitates precise manipulation of
spin populations, a challenge yet to be fully addressed in this class of atomic
species. In this work, we present an all-optical method for deterministically
controlling the spin composition of a dipolar bosonic erbium gas, based on a
clock-like transition in the telecom window at 1299 nm. The atoms can be
prepared in just a few tens of microseconds in any spin-state composition using
a sequence of Rabi-pulse pairs, selectively coupling Zeeman sublevels of the
ground state with those of the long-lived clock-like state. Finally, we
demonstrate that this transition can also be used to create spin-selective
light shifts, thus fully suppressing spin-exchange collisions. These
experimental results unlock exciting possibilities for implementing advanced
spin models in isolated, clean and fully controllable lattice systems.
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