Cascade and locally dissipative realizations of linear quantum systems for pure Gaussian state covariance assignment

• Autores: Shan Ma--, Matthew J. Wooller, Ian R. Petersen, Naoki Hamamoto
• Localización: Automatica: A journal of IFAC the International Federation of Automatic Control, ISSN 0005-1098, Vol. 90, 2018, págs. 263-270
• Idioma: inglés
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• Resumen

  • This paper presents two realizations of linear quantum systems for covariance assignment corresponding to pure Gaussian states. The first one is called a cascade realization; given any covariance matrix corresponding to a pure Gaussian state, we can construct a cascaded quantum system generating that state. The second one is called a locally dissipative realization; given a covariance matrix corresponding to a pure Gaussian state, if it satisfies certain conditions, we can construct a linear quantum system that has only local interactions with its environment and achieves the assigned covariance matrix. Both realizations are illustrated by examples from quantum optics.