分束器的通用性
Universality of beamsplitters
摘要:
我们考虑的问题,建立一个任意的$N\times N$实正交算子使用有限集,$S$,基本量子光学门操作的$m\leq N$模式-的问题的普适性$S$的$N$模式。特别是,我们专注于$m$模式分束器的通用性问题。利用控制论方法和三维旋转的一些性质,证明了任意非平凡实双模和“几乎”任意非平凡实$3$模分束器在$m\geq3$模上是普适的.
英文摘要:
We consider the problem of building an arbitrary $N\times N$ real orthogonal operator using a finite set, $S$, of elementary quantum optics gates operating on $m\leq N$ modes - the problem of universality of $S$ on $N$ modes. In particular, we focus on the universality problem of an $m$-mode beamsplitter. Using methods of control theory and some properties of rotations in three dimensions, we prove that any nontrivial real 2-mode and "almost" any nontrivial real $3$-mode beamsplitter is universal on $m\geq3$ modes.
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