Universität zu Köln

Hou, Zhibo, Zhu, Huangjun, Xiang, Guo-Yong, Li, Chuan-Feng and Guo, Guang-Can (2016). Error-compensation measurements on polarization qubits. J. Opt. Soc. Am. B-Opt. Phys., 33 (6). S. 1256 - 1266. WASHINGTON: OPTICAL SOC AMER. ISSN 1520-8540

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Abstract

Systematic errors are inevitable in most measurements performed in real life because of imperfect measurement devices. Reducing systematic errors is crucial to ensuring the accuracy and reliability of measurement results. To this end, delicate error-compensation designs are often necessary in addition to device calibration to reduce the dependence of the systematic error on the imperfection of the devices. The art of error-compensation designs is well appreciated in nuclear magnetic resonance systems by using composite pulses. In contrast, there are few works on reducing systematic errors in quantum optical systems. Here we propose an error-compensation design applicable to reducing the systematic error in projective measurements on ensembles of both single and multiqubit systems. This design can significantly decrease the systematic error due to dominant error sources in typical optical experiments. In particular, it can reduce the systematic error to the second order of the phase errors of both the half-wave plate (HWP) and the quarter-wave plate as well as the angle error of the HWP. Its power in reducing the systematic error was verified experimentally on qubit state tomography and numerically on two-qubit state tomography. Our study may find applications in high-precision tasks in polarization optics and quantum optics. (C) 2016 Optical Society of America

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hou, Zhibo UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhu, Huangjun UNSPECIFIED UNSPECIFIED UNSPECIFIED Xiang, Guo-Yong UNSPECIFIED UNSPECIFIED UNSPECIFIED Li, Chuan-Feng UNSPECIFIED UNSPECIFIED UNSPECIFIED Guo, Guang-Can UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-273621
DOI:	10.1364/JOSAB.33.001256
Journal or Publication Title:	J. Opt. Soc. Am. B-Opt. Phys.
Volume:	33
Number:	6
Page Range:	S. 1256 - 1266
Date:	2016
Publisher:	OPTICAL SOC AMER
Place of Publication:	WASHINGTON
ISSN:	1520-8540
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Optics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27362