Project supported by the National Natural Science Foundation of China(Grant Nos.11574092,61775062,61378012,91121023,and 60978009);the National Basic Research Program of China(Grant No.2013CB921804);the Innovation Project of Graduate School of South China Normal University(Grant No.2017LKXM088)
Both the negativity of Wigner function and the phase sensitivity of an SU(1,1) interferometer are investigated in this paper. In the case that the even coherent state and squeezed vacuum state are input into the inter...