Extending Rotational Coherence of Interacting Polar Molecules in a Spin-Decoupled Magic Trap.

Superpositions of rotational states in polar molecules induce strong, long-range dipolar interactions. Here we extend the rotational coherence by nearly 1 order of magnitude to 8.7(6) ms in a dilute gas of polar ^{23}Na^{40}K molecules in an optical trap.