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贝叶斯频率估计中频率的先验分布对有色噪声作用的影响

杨棣 王元美 李军刚

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贝叶斯频率估计中频率的先验分布对有色噪声作用的影响

杨棣, 王元美, 李军刚

Influence of parameter prior information on effect of colored noise in Bayesian frequency estimation

Yang Di, Wang Yuan-Mei, Li Jun-Gang
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  • 在贝叶斯参数估计理论框架下,研究了被测参数的先验分布对有色噪声的抑制作用.选择一个受1/fα型谱密度有色噪声影响的自旋1/2量子比特作为量子探测系统来估计一个磁场强度的大小,利用贝叶斯代价函数的动力学演化来评判估计的精度,重点研究先验概率分布对噪声非高斯性的限制作用.研究发现:当先验概率的不确定度比较大时,有色噪声的非高斯性对频率估计精度的影响比较小;当先验概率的不确定度比较小时,有色噪声的非高斯性对频率估计精度的影响比较大.
    Parameter estimation, which undertakes one of the vital missions in quantum metrology, has attracted a lot of attention in recent years. A large number of investigations on the frequency estimation have been carried out. Most of them are based on Cramér-Rao bound estimation approach in which almost perfect knowledge of the parameter to be estimated is given. In reality, however, one has inadequate prior knowledge about the parameter to be estimated. Then the Bayesian estimation approach in which we can perform the estimation even if we only have partial prior information about the parameter would be an ideal choice. Prior information about the parameter can play a significant role in Bayesian statistical inference. So it is interesting to know how the prior knowledge affects the estimation accuracy in the estimation process. In the solid-state realization of probe system, material-specific fluctuations typically lead to the major contribution to the intrinsic noise. Then it is interesting to study the effects of colored noise on the quantum parameter estimation. In this work, we study the inhibitory effects of prior probability distribution of the parameter to be estimated on the effects of colored noise under the framework of Bayesian parameter estimation theory. In particular, we estimate the intensity of a magnetic field by adopting a spin-1/2 system which is influenced by the colored noise with 1/fα spectrum. To evaluate the accuracy of estimation, we obtain the Bayes cost analytically which can be applied to the noisy channels. We mainly focus on the inhibitory effect of prior probability distribution of measured parameter on the non-Gaussianity of noise. We find that for the case of broad prior frequency distribution, the influence of non-Gaussianity on the estimation is very weak. While for the case of narrow prior frequency distribution, the influence of non-Gaussianity on the estimation is strong. That means that in the Bayesian approach, when we have enough prior information about the frequency, the non-Gaussianity can conduce to the improvement of the accuracy of the estimation of the frequency. When we lose the prior information, we also lose the improvement of the accuracy from the non-Gaussianity. The uncertainty of the prior information tends to eliminate the effects of the non-Gaussianity of the noise.
      通信作者: 李军刚, jungl@bit.edu.cn
    • 基金项目: 国家自然科学基金(批准号:11775019)和北京理工大学基础研究基金资助的课题.
      Corresponding author: Li Jun-Gang, jungl@bit.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant No. 11775019) and the Fundamental Research Fund of Beijing Institute of Technology, China.
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    Li X L, Li J G, Wang Y M 2017 Phys. Lett. A 381 216

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    Kakuyanagi K, Meno T, Saito S, Nakano H, Semba K, Takayanagi H, Deppe F, Shnirman A 2007 Phys. Rev. Lett. 98 047004

    [29]

    Bergli J, Galperin Y M, Altshuler B L 2009 New J. Phys. 11 025002

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    Benedetti C, Buscemi F, Bordone P 2013 Phys. Rev. A 87 052328

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    Benedetti C, Paris M G A, Maniscalco S 2014 Phys. Rev. A 89 012114

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    [33]

    Li J G, Wang Y M, Yang D, Zou J 2017 Phys. Rev. A 96 052130

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    Wiebe N, Granade C E, Ferrie C, Cory D G 2014 Phys. Rev. Lett. 112 190501

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  • [1]

    Wiseman H M, Milburn G J 2009 Quantum Measurement and Control (England: Cambridge University Press) pp51, 52

    [2]

    Paris M G A, Řeháček J 2010 Quantum Estimation Theory (Berlin: Springer-Verlag) pp1, 2

    [3]

    Helstrom C W 1976 Quantum Detection and Estimation Theory (New York: Academic Press) pp231, 252

    [4]

    Holevo A S 1982 Probabilistic and Statistical Aspects of Quantum Theory (Amsterdam: North-Holland) p64

    [5]

    Dowling J P 2008 Contemp. Phys. 49 125

    [6]

    Braunstein S L, Caves C M 1994 Phys. Rev. Lett. 72 3439

    [7]

    Pairs M G A 2009 Int. J. Quantum Inform. 7 125

    [8]

    Giovannetti V, Lloyd S, Maccone L 2011 Nat. Photon. 5 222

    [9]

    Demkowicz-Dobrzański R, Kołodyński J, Guţǎ M 2012 Nat. Commun. 3 1063

    [10]

    Escher B M, de Matos Filho R L, Davidovich L 2011 Nat. Phys. 7 406

    [11]

    Liu Y C, Xu Z F, Jin G R 2011 Phys. Rev. Lett. 107 013601

    [12]

    Liu G Q, Zhang Y R, Chang Y C, Yue J D, Fan H, Pan X Y 2015 Nat. Commun. 6 6726

    [13]

    Giovannetti V, Lloyd S, Maccone L 2006 Phys. Rev. Lett. 96 010401

    [14]

    Jarzyna M, Demkowicz-Dobrzański R 2015 New J. Phys. 17 013010

    [15]

    Demkowicz-Dobrzański R 2011 Phys. Rev. A 83 061802R

    [16]

    Cramér H 1946 Mathematical Methods of Statistics (Princeton, NJ: Princeton University Press) pp498-500

    [17]

    Lu X M, Sun Z, Wang X G, Luo S L, Oh C H 2013 Phys. Rev. A 87 050302

    [18]

    Li N, Luo S L 2013 Phys. Rev. A 88 014301

    [19]

    Lu X M, Wang X G, Sun C P 2010 Phys. Rev. A 82 042103

    [20]

    Zhang Y M, Li X W, Yang W, Jin G R 2013 Phys. Rev. A 88 043832

    [21]

    Chin A W, Huegla S F, Plenio M B 2012 Phys. Rev. Lett. 109 233601

    [22]

    Monras A, Paris M G A 2007 Phys. Rev. Lett. 98 160401

    [23]

    Li X L, Li J G, Wang Y M 2017 Phys. Lett. A 381 216

    [24]

    Ma J, Huang Y X, Wang X G, Sun C P 2011 Phys. Rev. A 84 022302

    [25]

    Zhong W, Sun Z, Ma J, Wang X G, Nori F 2013 Phys. Rev. A 87 022337

    [26]

    Weiss U 1993 Quantum Dissipative System (Singapore: World Scientific) p5

    [27]

    Yoshihara F, Harrabi K, Niskanen A O, Nakamura A, Tsai J S 2006 Phys. Rev. Lett. 97 167001

    [28]

    Kakuyanagi K, Meno T, Saito S, Nakano H, Semba K, Takayanagi H, Deppe F, Shnirman A 2007 Phys. Rev. Lett. 98 047004

    [29]

    Bergli J, Galperin Y M, Altshuler B L 2009 New J. Phys. 11 025002

    [30]

    Benedetti C, Buscemi F, Bordone P 2013 Phys. Rev. A 87 052328

    [31]

    Benedetti C, Paris M G A, Maniscalco S 2014 Phys. Rev. A 89 012114

    [32]

    Ban M 2016 Quantum Inf. Process. 15 2213

    [33]

    Li J G, Wang Y M, Yang D, Zou J 2017 Phys. Rev. A 96 052130

    [34]

    Wiebe N, Granade C E, Ferrie C, Cory D G 2014 Phys. Rev. Lett. 112 190501

    [35]

    Wang J W, Paesani S, Santagati R, Knauer S, Gentile A A, Wiebe N, Petruzzella M, O’Brien J L, Rarity J G, Laing A, Thompson M G 2017 Nat. Phys. 13 551

    [36]

    Stenberg M P V, Köhn O, Wilhelm F K 2016 Phys. Rev. A 93 012122

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出版历程
  • 收稿日期:  2017-08-28
  • 修回日期:  2017-12-28
  • 刊出日期:  2019-03-20

贝叶斯频率估计中频率的先验分布对有色噪声作用的影响

  • 1. 北京理工大学物理学院, 北京 100081
  • 通信作者: 李军刚, jungl@bit.edu.cn
    基金项目: 国家自然科学基金(批准号:11775019)和北京理工大学基础研究基金资助的课题.

摘要: 在贝叶斯参数估计理论框架下,研究了被测参数的先验分布对有色噪声的抑制作用.选择一个受1/fα型谱密度有色噪声影响的自旋1/2量子比特作为量子探测系统来估计一个磁场强度的大小,利用贝叶斯代价函数的动力学演化来评判估计的精度,重点研究先验概率分布对噪声非高斯性的限制作用.研究发现:当先验概率的不确定度比较大时,有色噪声的非高斯性对频率估计精度的影响比较小;当先验概率的不确定度比较小时,有色噪声的非高斯性对频率估计精度的影响比较大.

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