A new approach to obtaining positive-definite Wigner operator for two entangled particles with different masses

作者:Fan Hong-Yi; Xu Xue-Xiang; Yuan Hong-Chun; Wang Shuai; Wang Zhen; Xu Peng; Jiang Nian-Quan*
来源:Chinese Physics B, 2011, 20(7): 070301.
DOI:10.1088/1674-1056/20/7/070301

摘要

Based on our previously proposed Wigner operator in entangled form, we introduce the generalized Wigner operator for two entangled particles with different masses, which is expected to be positive-definite. This approach is able to convert the generalized Wigner operator into a pure state so that the positivity can be ensured. The technique of integration within an ordered product of operators is used in the discussion.