论文标题
Superdark激发态在原子阵列中的量子工程
Quantum Engineering of Superdark Excited States in Arrays of Atoms
论文作者
论文摘要
我们建议一种定期的方法，可以在n个相同的原子的通用小型集合中实现集体单一激发态的寿命极长。这样的“超级黑”状态的衰减率γ_n可以像γ_n\ proptoγ（r/λ）^{2（n-1）}（γis辐射衰减速率，r和λ相比，辐射的波长分别比任何系统都更小。该方法基于原子哈密顿量的特殊微调：即，基于适当的位置依赖性原子过渡频率调整。因此，选定的控制参数足以确保在通用原子（``Qubits'）中以最小的工程状态自发衰减率的最小值。
We suggest a regular method of achieving an extremely long lifetime of a collective singly excited state in a generic small-size ensemble of N identical atoms. The decay rate Γ_N of such a `superdark' state can be as small as Γ_N \propto Γ(r/λ)^{2(N-1)} (Γis the radiative decay rate of an individual atom, r and λare the system size and the wavelength of the radiation, respectively), i.e., considerably smaller than in any of the systems suggested up to now. The method is based on a special fine tuning of the atomic Hamiltonian: namely, on a proper position-dependent adjustment of atomic transition frequencies. So chosen set of the control parameters is sufficient to ensure the minimum of the spontaneous decay rate of the engineered state in a generic ensemble of atoms (`qubits').
