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腔中原子碰撞的相干控制

Coherent control of an atomic collision in a cavity

S. Osnaghi, P. Bertet, A. Auffeves, P. Maioli, M. Brune, J. M. Raimond, S. Haroche

摘要:

根据S. B. Zheng和G. C. Guo(Phys. Rev. Lett. 85,2392(2000)),我们报道了一个实验,其中两个里德伯原子通过非共振腔的相干能量交换纠缠。该过程由微波光子的虚发射和吸收介导,其特征在于碰撞混合角比具有相同碰撞参量的自由空间中碰撞的原子大四个数量级。通过调节原子-腔的失谐量来控制最终的纠缠态。这一过程,基本上不敏感的热场和光子衰变,打开复杂的纠缠操纵有前途的前景。

英文摘要:

Following a recent proposal by S. B. Zheng and G. C. Guo (Phys. Rev. Lett. 85, 2392 (2000)), we report an experiment in which two Rydberg atoms crossing a non-resonant cavity are entangled by coherent energy exchange. The process, mediated by the virtual emission and absorption of a microwave photon, is characterized by a collision mixing angle four orders of magnitude larger than for atoms colliding in free space with the same impact parameter. The final entangled state is controlled by adjusting the atom-cavity detuning. This procedure, essentially insensitive to thermal fields and to photon decay, opens promising perspectives for complex entanglement manipulations.

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