Improving Einstein-Podolsky-Rosen steering inequalities with state information

James Schneeloch, Curtis J. Broadbent, John C. Howell

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

תקציר

We discuss the relationship between entropic Einstein-Podolsky-Rosen (EPR)-steering inequalities and their underlying uncertainty relations along with the hypothesis that improved uncertainty relations lead to tighter EPR-steering inequalities. In particular, we discuss how using information about the state of a quantum system affects one's ability to witness EPR-steering. As an example, we consider the recent improvement to the entropic uncertainty relation between pairs of discrete observables (Berta et al., 2010 [10]). By considering the assumptions that enter into the development of a steering inequality, we derive correct steering inequalities from these improved uncertainty relations and find that they are identical to ones already developed (Schneeloch et al., 2013 [9]). In addition, we consider how one can use state information to improve our ability to witness EPR-steering, and develop a new continuous variable symmetric EPR-steering inequality as a result.

שפה מקוריתאנגלית אמריקאית
עמודים (מ-עד)766-769
מספר עמודים4
כתב עתPhysics Letters, Section A: General, Atomic and Solid State Physics
כרך378
מספר גיליון10
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 14 פבר׳ 2014
פורסם באופן חיצוניכן

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