论文标题
塔维斯 - 卡明模型中黑暗状态的崩溃
Collapse of dark states in Tavis-Cummings model
论文作者
论文摘要
两个两层原子系统的单线状态平稳地变化，保持黑暗，尽管哈密顿TC逐渐变形，尽管绝热定理对这种情况有不适用。在这种情况下，游离光子发射的可能性很小，这不取决于哈密顿量变形的平滑度。由于腔中的虚拟光子的交换，在单线状态中增加了一对原子，从而增强了自发发射的效果。对于原子可以在两个腔之间移动的情况，但相反，随着原子数量的增加，发射降低。必须在原子旋风的实际操作中考虑这种纯粹的量子效应。但是，它的弱点证明了黑暗状态的稳定性以及它们在信息交换（量子加密协议）中的使用前景和作为非驱动器的能量蓄能器。
The singlet state of a system of two two-level atoms changes smoothly, remaining dark, as the Hamiltonian TC is slowly deformed, despite the inapplicability of the adiabatic theorem to this case. In this case, there is a small probability of emission of free photons, which does not depend on the smoothness of the deformation of the Hamiltonian. The effect of spontaneous emission is enhanced by the addition of one more pair of atoms in the singlet state due to the exchange of virtual photons in the cavity. A similar effect was also established for the case when atoms can move between two cavities, but here, on the contrary, with an increase in the number of atoms, the emission decreases. This purely quantum effect must be taken into account in practical manipulations with atomic singlets; however, its weakness testifies, rather, to the stability of dark states and the prospects for their use in information exchange (quantum cryptographic protocols) and as an energy accumulator for nono-devices.
