When quantum state tomography benefits from willful ignorance. (21st July 2021)

• Record Type: Journal Article
• Authors: Motka, Libor; Paúr, Martin; Řeháček, Jaroslav; Hradil, Zdeněk; Sánchez-Soto, Luis L
• Is Part Of: New journal of physics. Volume 23:Number 7(2021)
• Publication Date: 2021-07-21
• Subjects: quantum state tomography -- quantum detector tomography -- data patterns; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/ac0fff
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: We show that quantum state tomography with perfect knowledge of the measurement apparatus proves to be, in some instances, inferior to strategies discarding all information about the measurement at hand, as in the case of data pattern tomography. In those scenarios, the larger uncertainty about the measurement is traded for the smaller uncertainty about the reconstructed signal. This effect is more pronounced for minimal or nearly minimal informationally complete measurement settings, which are of utmost practical importance.