TY - GEN
T1 - Entanglement-Preserving Control of Three-Qubit Systems Under Local Markovian Dephasing
AU - Xie, Siao
AU - Yu, Shanping
AU - Xi, Zairong
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2026.
PY - 2026
Y1 - 2026
N2 - This work uses the GHZ state as the initial state and selects the minimum quantum relative entropy as the entanglement measure. Based on these settings, various traditional dynamical decoupling methods are systematically compared. The results reveal significant limitations in their ability to preserve entanglement under a local Markovian environment. To overcome these limitations, we first investigate non-π pulse control strategies. These strategies induce the system to evolve toward more stable entangled states by modifying the structure of the density matrix. On this basis, three structural stability principles closely related to entanglement preservation are summarized, and two structurally optimized states, |ψrobust1⟩ and |ψrobust2⟩, are constructed accordingly, successfully achieving the preservation of entanglement structure in the three-qubit system.
AB - This work uses the GHZ state as the initial state and selects the minimum quantum relative entropy as the entanglement measure. Based on these settings, various traditional dynamical decoupling methods are systematically compared. The results reveal significant limitations in their ability to preserve entanglement under a local Markovian environment. To overcome these limitations, we first investigate non-π pulse control strategies. These strategies induce the system to evolve toward more stable entangled states by modifying the structure of the density matrix. On this basis, three structural stability principles closely related to entanglement preservation are summarized, and two structurally optimized states, |ψrobust1⟩ and |ψrobust2⟩, are constructed accordingly, successfully achieving the preservation of entanglement structure in the three-qubit system.
KW - decoherence
KW - entanglement preservation
KW - minimum quantum relative entropy
UR - https://www.scopus.com/pages/publications/105039139239
U2 - 10.1007/978-981-95-6553-5_32
DO - 10.1007/978-981-95-6553-5_32
M3 - Conference contribution
AN - SCOPUS:105039139239
SN - 9789819565528
T3 - Lecture Notes in Electrical Engineering
SP - 354
EP - 362
BT - Proceedings of 2025 Chinese Intelligent Systems Conference
A2 - Jia, Yingmin
A2 - Liu, Yang
A2 - Zhang, Weicun
A2 - Fu, Yongling
PB - Springer Science and Business Media Deutschland GmbH
T2 - 21st Chinese Intelligent Systems Conference, CISC 2025
Y2 - 25 October 2025 through 26 October 2025
ER -