General criteria for quantum state smoothing with necessary and sufficient criteria for linear Gaussian quantum systems

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Laverick, Kiarn T
Chantasri, Areeya
Wiseman, Howard M
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2020
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Abstract

). However, this smoothing technique requires an observer (Alice, say) to know the nature of the measurement records that are unknown to her in order to characterize the possible true states for Bob’s (say) systems. If Alice makes an incorrect assumption about the set of true states for Bob’s system, she will obtain a smoothed state that is suboptimal, and, worse, may be unrealizable (not corresponding to a valid evolution for the true states) or even unphysical (not represented by a state matrix

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Quantum Studies: Mathematics and Foundations
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© 2020 Springer International Publishing Switzerland. This is an electronic version of an article published in Advances in Quantum Studies: Mathematics and Foundations, 2020. Advances in Intelligent Systems and Computing is available online at: http://link.springer.com/ with the open URL of your article.
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Physical sciences
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Quantum physics
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Laverick, KT; Chantasri, A; Wiseman, HM, General criteria for quantum state smoothing with necessary and sufficient criteria for linear Gaussian quantum systems, Quantum Studies: Mathematics and Foundations
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