System Identification for Passive Linear Quantum Systems

Madalin Guta, Naoki Yamamoto

研究成果: Article査読

54 被引用数 (Scopus)

抄録

System identification is a key enabling component for the implementation of quantum technologies, including quantum control. In this paper, we consider the class of passive linear input-output systems, and investigate several basic questions: 1) which parameters can be identified? 2) Given sufficient input-output data, how do we reconstruct the system parameters? 3) How can we optimize the estimation precision by preparing appropriate input states and performing measurements on the output? We show that minimal systems can be identified up to a unitary transformation on the modes, and systems satisfying a Hamiltonian connectivity condition called 'infecting' are completely identifiable. We propose a frequency domain design based on a Fisher information criterion, for optimizing the estimation precision for coherent input state. As a consequence of the unitarity of the transfer function, we show that the Heisenberg limit with respect to the input energy can be achieved using non-classical input states.

本文言語English
論文番号7130587
ページ(範囲)921-936
ページ数16
ジャーナルIEEE Transactions on Automatic Control
61
4
DOI
出版ステータスPublished - 2016 4月 1

ASJC Scopus subject areas

  • 制御およびシステム工学
  • コンピュータ サイエンスの応用
  • 電子工学および電気工学

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