Nondegenerate electron beam parametric amplifier 非简并电子束参量放大器
CV entanglement can be accomplished by coupling squeezed states on a beam splitter, also can be directly generated from an non-degenerate optical parametric amplifier ( NOPA). 连续变量纠缠可以利用单模压缩态在分束器上耦合实现,也可由一个Ⅱ类匹配非线性晶体组成的非简并光学参量放大器(NOPA)直接产生。