arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0309140quant-ph
收藏

利用线性光学和光电探测改进单光子源

On improving single photon sources via linear optics and photodetection

Dominic W. Berry, Stefan Scheel, Barry C. Sanders, Peter L. Knight

摘要:

在实践中,单光子被生成为真空与单光子的混合物,其权重分别为1-p和p;在这里,我们关心的是通过将多个单光子-真空混合物的拷贝引入线性光学器件并对某些输出应用光电探测来有条件地制备具有较大p的单光子态来增加p。我们证明了在一定条件下,通过线性光学和基于光电探测的条件准备来提高p,并且我们还建立了一类可以提高p的光电探测事件。此外,我们还证明了不完全(p<1)的输入不可能通过这种方法获得完美(p=1)的单光子态。

英文摘要:

In practice, single photons are generated as a mixture of vacuum with a single photon with weights 1-p and p, respectively; here we are concerned with increasing p by directing multiple copies of the single photon-vacuum mixture into a linear optic device and applying photodetection on some outputs to conditionally prepare single photon states with larger p. We prove that it is impossible, under certain conditions, to increase p via linear optics and conditional preparation based on photodetection, and we also establish a class of photodetection events for which p can be improved. In addition we prove that it is not possible to obtain perfect (p=1) single photon states via this method from imperfect (p<1) inputs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑