论文标题
超速基态NARB分子之间破坏性化学反应的光学屏蔽
Optical shielding of destructive chemical reactions between ultracold ground-state NaRb molecules
论文作者
论文摘要
我们提出了一种抑制超电位玻色粒地基 - $^{23} $ na $^{87} $ rb分子之间的化学反应的方法。通过在电子基态的最低旋转式水平之间的过渡$ x^1σ^+（v_x = 0，j_x = 0）$之间的过渡中施加激光器，而持久的$ b^3π_0（v_x = 0）$用于线性和圆形激光极化的反应性和光诱导的非弹性碰撞。我们证明了$ b^3π_0（v_b = 0，j_b = 1）的自发发射不会使屏蔽过程恶化。这为冷分子陷阱的寿命和有效的蒸发冷却大大增加了。我们还预计，所提出的机制对于具有足够大的偶极偶极相互作用的碱金属硅藻有效。
We propose a method to suppress the chemical reactions between ultracold bosonic ground-state $^{23}$Na$^{87}$Rb molecules based on optical shielding. By applying a laser with a frequency blue-detuned from the transition between the lowest rovibrational level of the electronic ground state $X^1Σ^+ (v_X=0, j_X=0)$, and the long-lived excited level $b^3Π_0 (v_b=0, j_b=1)$, the long-range dipole-dipole interaction between the colliding molecules can be engineered, leading to a dramatic suppression of reactive and photoinduced inelastic collisions, for both linear and circular laser polarizations. We demonstrate that the spontaneous emission from $b^3Π_0 (v_b=0, j_b=1)$ does not deteriorate the shielding process. This opens the possibility for a strong increase of the lifetime of cold molecule traps, and for an efficient evaporative cooling. We also anticipate that the proposed mechanism is valid for alkali-metal diatomics with sufficiently large dipole-dipole interactions.
