论文标题
通过共振和混沌辅助隧道与超低骨化原子的正午状态
NOON states with ultracold bosonic atoms via resonance- and chaos-assisted tunneling
论文作者
论文摘要
我们从理论上研究了微观原子中的正午状态的产生，对应于连贯的| n，0> + | 0，n>与N〜5颗粒的叠加，是通过在自捕获方案中相互作用的超对称性的相互作用的超模原子的集体隧穿。我们表明，使用适当调整的振幅和频率参数定期驾驶双重井，使人们可以大大提高此隧道过程，而不会改变其集体特征。产生中午叠加的时间尺度，这对应于一半的隧道时间，并且对于所考虑的原子种群而言，在非传播的双重井中会非常大，从而可以大幅度降低，从而通过该协议实现实验性可行。在这种情况下，共振和混乱辅助的隧道被确定为关键机制。对其对集体隧道过程的影响的定量半经验评估使人们可以确定驾驶参数的最佳选择，以便尽可能快地生成这些中午状态。
We theoretically investigate the generation of microscopic atomic NOON states, corresponding to the coherent |N,0> + |0,N> superposition with N ~ 5 particles, via collective tunneling of interacting ultracold bosonic atoms within a symmetric double-well potential in the self-trapping regime. We show that a periodic driving of the double well with suitably tuned amplitude and frequency parameters allows one to substantially boost this tunneling process without altering its collective character. The time scale to generate the NOON superposition, which corresponds to half the tunneling time and would be prohibitively large in the undriven double well for the considered atomic populations, can thereby be drastically reduced, which renders the realization of NOON states through this protocol experimentally feasible. Resonance- and chaos-assisted tunneling are identified as key mechanisms in this context. A quantitative semiclassical evaluation of their impact onto the collective tunneling process allows one to determine the optimal choice for the driving parameters in order to generate those NOON states as fast as possible.
