Power Spectrum Identification for Quantum Linear Systems

Autor:	Levitt, Matthew, Guta, Madalin, Nurdin, Hendra I.
Rok vydání:	2016
Předmět:	Quantum Physics
Zdroj:	Automatica, 90 255-262 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1016/j.automatica.2017.12.037
Popis:	In this paper we investigate system identification for general quantum linear systems. We consider the situation where the input field is prepared as stationary (squeezed) quantum noise. In this regime the output field is characterised by the power spectrum, which encodes covariance of the output state. We address the following two questions: (1) Which parameters can be identified from the power spectrum? (2) How to construct a system realisation from the power spectrum? The power spectrum depends on the system parameters via the transfer function. We show that the transfer function can be uniquely recovered from the power spectrum, so that equivalent systems are related by a symplectic transformation. Comment: 10 pages, 2 figures, submitted to Automatica. arXiv admin note: text overlap with arXiv:1608.01227
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1612.02681 Zobrazit plný text záznamu View this record from Arxiv