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题名: Post-selected von Neumann measurement with Hermite-Gaussian and Laguerre-Gaussian pointer states
作者: Turek, Y;  Kobayashi, H;  Akutsu, T;  Sun, CP;  Shikano, Y
刊名: NEW JOURNAL OF PHYSICS
出版日期: 2015
卷号: 17, 期号:0, 页码:83029
关键词: von Neumann interaction ;  quantum measurement ;  weak measurement ;  higher-order Gaussian mode ;  signal-to-noise ratio ;  weak-value amplification
学科分类: Physics
DOI: http://dx.doi.org/10.1088/1367-2630/17/8/083029
通讯作者: Turek, Y (reprint author), Natl Inst Nat Sci, Inst Mol Sci, Res Ctr Integrat Mol Syst CIMoS, 38 Nishigonaka, Okazaki, Aichi 4448585, Japan.
文章类型: Article
英文摘要: Through the von Neumann interaction followed by post-selection, we can extract not only the eigenvalue of an observable of the measured system but also the weak value. In this post-selected von Neumann measurement, the initial pointer state of the measuring device is assumed to be a fundamental Gaussian wave function. By considering the optical implementation of the post-selected von Neumann measurement, higher-order Gaussian modes can be used. In this paper, we consider the Hermite-Gaussian (HG) and Laguerre-Gaussian (LG) modes as pointer states and calculate the average shift of the pointer states of the post-selected von Neumann measurement by assuming the system observable (A) over cap with (A) over cap (2) (I) over cap = and (A) over cap (2) = (A) over cap for an arbitrary interaction strength, where (I) over cap represents the identity operator. Our results show that theHGand LG pointer states for a given coupling direction have advantages and disadvantages over the fundamental Gaussian mode in improving the signal-to-noise ratio. Weexpect that our general treatment of the weak values will be helpful for understanding the connection between weak-and strong-measurement regimes and may be used to propose new experimental setups with higher-order Gaussian beams to investigate further the applications of weak measurement in optical systems such as the optical vortex.
类目[WOS]: Physics, Multidisciplinary
关键词[WOS]: SPATIAL LIGHT MODULATORS ;  NITROGEN-VACANCY CENTER ;  WEAK MEASUREMENT ;  VALUES ;  SPIN ;  INTERFEROMETER ;  INEQUALITY ;  VIOLATION ;  PRECISION ;  PHOTONS
收录类别: SCI
项目资助者: Sumitomo Foundation ;  Matsuo Foundation ;  IMS Joint Study Program ;  NINS youth collaborative projects ;  Center for the Promotion of Integrated Sciences (CPIS) of Sokendai ;  ICRR Joint Research from The University of Tokyo ;  JSPS KAKENHI [24654133, 25790068, 25287101] ;  IMS Internship project
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20897
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Turek, Y,Kobayashi, H,Akutsu, T,et al. Post-selected von Neumann measurement with Hermite-Gaussian and Laguerre-Gaussian pointer states[J]. NEW JOURNAL OF PHYSICS,2015,17(0):83029.
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