【作者】 程桂平；

【导师】 李高翔；

【作者基本信息】 华中师范大学 ， 光学， 2007， 硕士

【摘要】 对两原子共振荧光的相干性质和相对位置测量的研究不仅可验证量子力学的基本原理，而且对量子信息科学的发展起着积极的推动作用。本文研究了置于光腔中的两个二能级原子，在强相干场驱动下的共振荧光光场的辐射场相干性质，发现在坏腔条件下，可以通过调节光腔与相干场的频率来提高一阶可见度和减小二阶关联函数。这是因为改变光腔与相干场的频率会引起原子修饰态布居数的改变，导致一阶可见度和二阶关联函数发生显著变化。本文研究了置于一个单模驻波光腔中的两个二能级原子，通过利用测量场的正交分量的方法定位这两个原子位置的情况，发现在不考虑腔损耗的条件下，利用此方法即可很好地定位两原子的位置。若考虑腔损耗时，通过将测量所输出的信号反馈回光腔中的方法可降低由腔损耗所导致两原子定位能力的损害程度。更多还原

【Abstract】 The studies of the coherence of resonance fluorescence and the measurement of relative position for two atoms not only validate the basic theory of quantum mechanics, but also push the development of quantum information.We have investigated the coherence of resonance fluorescence for a coherently driven two two-level atoms coupled to a single-mode cavity in the bad cavity limit.By adjusting the detuning of the cavity-mode frequency from the driving filed frequency, we can enhance the fringe contrast factor as well as decrease the second order correlation function.It is found that the detuning has an effect on the atomic dress-state population,which makes the fringe contrast factor and the second order correlation function changed evidently.We have investigated the localization of the two atoms passing through a standing wave in an optical cavity by measuring the field quadrature , it can be found that the localization of the two atoms can be better resolved in the absence of the damping of cavity. If we take into account the damping of cavity, the damage of atomic-position localization resulting from the damping of cavity can be decreased by feeding back into the cavity part of the output signal.更多还原