Open AccessFeedback preparation of maximally entangled states of two‐qubit systems
Author(s) -
Zhou Juan,
Kuang Sen
Publication year - 2016
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2015.0248
Subject(s) - qubit , observable , control theory (sociology) , control (management) , stability (learning theory) , constant (computer programming) , state (computer science) , computer science , bell state , channel (broadcasting) , field (mathematics) , quantum , topology (electrical circuits) , mathematics , physics , quantum mechanics , telecommunications , algorithm , artificial intelligence , combinatorics , machine learning , pure mathematics , programming language
Bell states play a central role in the field of quantum information. For two‐qubit systems, this study proposes a new non‐smooth control strategy within the theoretical framework of quantum continuous measurement, and achieves global feedback stabilisation in any target Bell state. For a target Bell state, the authors select one measured observable and two control channels, where the control law associated with one channel is kept constant. They design a non‐smooth control law for the other control channel, and prove the stability of the whole closed‐loop system. Some simulation experiments show that the control strategy in this paper has a good control effect.