非简并参量下转换过程中的量子导引性质

本文研究了非简并参量下转换过程中量子导引的特性。研究发现:在短时区域,光场间可以实现双向的量子导引。在稳态区域,光场间只能实现单向的量子导引,双向的量子导引不能产生,并且若光场具有相同的耗散速率,则量子导引不可形成;相比于导引光场,被导引光场则需具有更大的耗散速率。此外还发现在阈值点附近,没有稳定的量子导引产生。

Properties of Quantum Steering in a Non-degenerate Parametric Down-convertor

In this paper,the properties of quantum steering in a non-degenerate parametric down-convertor in a cavity were investigated.We have found that in the short-time regime,the two-way steering between two cavity fields can be achieved.By contrast,in the regime of steady states,only one-way steering can be achieved and the steering direction is determined by the relative dissipation rate of the two cavity fields.The steered field should possess larger dissipation rate,in comparison to the steered one.In addition,the steady-state steering cannot occur for the same dissipation rates,and it is also absent near the threshold.