Direct Bell state measurement for optical beams with correlated amplitude quadratures and anticorrelated phase quadratures
正交振幅正关联正交位相反关联光束的贝尔态直接测量

A new method is produced of directly measuring EPR beams. This measurement scheme can be used for measuring the correlation degree of EPR beams with correlated amplitude quadratures and anticorrelated phase quadratures without using local oscillators. Then a new scheme for quantum dense coding is proposed based on this measurement scheme.