We investigate theoretically the possibility for robust and fast cooling of a trapped atomic ion by transient interaction with a pre-cooled ion. The transient coupling is achieved through dynamical control of the ions' equilibrium positions. To achieve short cooling times we make use of shortcuts to adiabaticity by applying invariant-based engineering. We design these to take account of imperfections such as stray fields, and trap frequency offsets. For settings appropriate to a currently operational trap in our laboratory, we find that robust performance could be achieved down to $6.3$ motional cycles, comprising $14.2\ \mathrm{\mu s}$ for ions with a $0.44\ \mathrm{MHz}$ trap frequency. This is considerably faster than can be achieved using laser cooling in the weak coupling regime, which makes this an attractive scheme in the context of quantum computing.

中文翻译：

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具有捕获离子的稳健动态交换冷却

我们从理论上研究了通过与预冷离子的瞬态相互作用对捕获的原子离子进行稳健和快速冷却的可能性。瞬态耦合是通过离子平衡位置的动态控制来实现的。为了缩短冷却时间，我们通过应用基于不变量的工程来利用绝热的捷径。我们设计这些是为了考虑杂散场和陷阱频率偏移等缺陷。对于适合我们实验室当前操作陷阱的设置，我们发现稳健的性能可以实现低至 6.3 美元的运动周期，包括 14.2 美元\ \mathrm{\mu s}$ 的离子具有 0.44 美元\ \mathrm{MHz}$陷阱频率。这比在弱耦合状态下使用激光冷却可以实现的速度要快得多，