Understanding non-classical correlation using optical hybrid states in noisy quantum channels
- Title
- Understanding non-classical correlation using optical hybrid states in noisy quantum channels
- Author
- 권영헌
- Keywords
- non-classical correlation; optical hybrid state; noisy quantum channel
- Issue Date
- 2018-11
- Publisher
- Institute of Physics Publishing
- Citation
- Journal of Physics A: Mathematical and Theoretical, v. 51, NO. 45, article no. 455302, Page. 1-16
- Abstract
- In this article we investigate the non-classical correlation in a macroscopic physical system. As a tool, we consider an optical hybrid state that is a micro- macro entangled state. Our strategy is to study the behavior of non-classical correlation in an optical hybrid state that may go through noisy channels. We study the violation of two inequalities, which are the CHSH-inequality and the (generalized) CHSH-like-inequality, as measures of non-classical correlation. First, we find that when on/off or parity measurements are used for the side of the coherent state in an optical hybrid state, the violation of the CHSH-inequality is the same as that of the (generalized) CHSH-like-inequality. Second, we see that each measurement provides a different value of violation of (generalized) CHSH-inequality when it is an optical hybrid state that goes through noisy channels. A suprising result is that the on/off measurement can provide a violation of CHSH-inequality (or (generalized) CHSH-like-inequality) for an optical hybrid state with any amount of colored noise. This implies that colored noise cannot break the non-classical correlation in an optical hybrid state.
- URI
- https://iopscience.iop.org/article/10.1088/1751-8121/aae0b2https://repository.hanyang.ac.kr/handle/20.500.11754/184095
- ISSN
- 1751-8113;1751-8121
- DOI
- 10.1088/1751-8121/aae0b2
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > APPLIED PHYSICS(응용물리학과) > Articles
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