标题： 电子激发在冷原子-离子化学中的作用 显示英文标题

标题： The role of electronic excitation in cold atom-ion chemistry

摘要： 电子激发在超冷钙原子和钡$^+$离子在混合陷阱中进行的电荷交换化学反应中的作用被研究。 这个典型的系统在其基态下由于能量原因无法发生反应，使得电子激发的影响可以被特别简单地解释。 发现虽然离子的电子激发可以显著影响化学反应速率，但中性原子的电子激发则不太重要。 还通过实验表明，选择合适的原子-离子对，可以在超冷原子-离子环境中减轻这些化学反应的不利影响，这标志着向新一代混合设备迈出的重要一步。 显示英文摘要

摘要： The role of electronic excitation in charge exchange chemical reactions between ultracold Ca atoms and Ba$^+$ ions, confined in a hybrid trap, is studied. This prototypical system is energetically precluded from reacting in its ground state, allowing a particularly simple interpretation of the influence of electronic excitation. It is found that while electronic excitation of the ion can critically influence the chemical reaction rate, electronic excitation of the neutral atom is less important. It is also experimentally demonstrated that with the correct choice of the atom-ion pair, it is possible to mitigate the unwanted effects of these chemical reactions in ultracold atom-ion environments, marking an important step towards the next generation of hybrid devices.