논문 해외 국제전문학술지(SCI급) Entropic nonclassicality and quantum non-Gaussianity tests via beam splitting
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2019-11
- 저자명 Jiyong Park, Jaehak Lee, and Hyunchul Nha
- 학술지명 Scientific Reports
- 발행처명 Nature Publishing Group
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 3
홈페이지논문 초록 (Abstract)
We propose entropic nonclassicality criteria for quantum states of light that can be readily tested using homodyne detection with beam splitting operation. Our method draws on the fact that the entropy of quadrature distributions for a classical state is non-increasing under an arbitrary loss channel. We show that our test is strictly stronger than the variance-based squeezing condition and that it can also be extended to detect quantum non-Gaussianity in conjunction with phase randomization. Furthermore, we address how our criteria can be used to identify single-mode resource states to generate two-mode states demonstrating EPR paradox, i.e., quantum steering, via beam-splitter setting.