Generation of negative Wigner function light using using exciton-polariton condensates

使用激子-极化子凝聚体产生负维格纳函数光

基本信息

批准号：
26790061
负责人：
BYRNES TIMOTHY
金额：
$ 2.25万
依托单位：
National Institute of Informatics
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2014
资助国家：
日本
起止时间：
2014-04-01 至 2015-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26790061/
关键词：
exciton-polariton Bose-Einstein condensate quantum information non-Gaussian light source

项目摘要

The main aim of the proposal was to investigate using exciton-polariton condensates as a source of non-Gaussian light. Specifically, there were 3 sub-aims that were targeted: (I)Exploration of parameter space and optimization of model parameters (II)Simplification of the principle of the previous work (III)Finding applications of non-Gaussian light from polaritons.This was originally planned as a two-year project, with aims (I) and (II) being completed in the first year, and aim (III) being completed in the second year. As of January 2015, I have now relocated to New York University's Shanghai campus in China, hence I terminated the project at the end of the first year. We have completed aims (I) and (II) and refined our scheme for producing non-Gaussian light. Aim (III) was not completed, and requires more work to complete that aspect of the project.In our previous scheme, two lasers were necessary to generate the non-Gaussian light. One for creating the exciton-polaritons in the first place, and another to fix the phase to avoid phase diffusion -- this completely destroys the effect that we are trying to create. We were successful in reducing this to a single laser, which not only simplifies the experimental setup, but makes the generation process much more straightforward. However, a phase fixing mechanism is still necessary, which is accomplished by another means, by feeding back a homodyne current. We found that this gives much stronger non-Gaussian light than our previous scheme, improving the performance greatly.

该提案的主要目的是研究使用激子极化子凝聚体作为非高斯光源。具体来说，有3个子目标：（一）参数空间探索和模型参数优化（二）前期工作原理的简化（三）从偏振子中寻找非高斯光的应用。这是原计划为一个为期两年的项目，第一年完成目标（I）和（II），第二年完成目标（III）。截至2015年1月，我已搬迁至纽约大学中国上海校区，因此我在第一年年底终止了该项目。我们已经完成了目标（I）和（II），并完善了我们产生非高斯光的方案。目标（III）尚未完成，需要更多的工作来完成该项目的这方面。在我们之前的方案中，需要两个激光器来产生非高斯光。一个用于首先创建激子极化子，另一个用于固定相位以避免相位扩散——这完全破坏了我们试图创建的效果。我们成功地将其简化为单个激光器，这不仅简化了实验设置，而且使生成过程更加简单。然而，相位固定机制仍然是必要的，这可以通过另一种方式来实现，即反馈零差电流。我们发现这比我们之前的方案提供了更强的非高斯光，从而大大提高了性能。