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Solid State Communications

Quantum coherence of the spin-1 system under an XY spin chain with three-spin interaction

Guanghao Xue, Liang Qiu, Fei Pan

Published Jul 31, 2019• 2 citations
Publisher
DOI
10.1016/j.ssc.2019.113696

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Recently, along with the development of quantum information, quantum entanglemant became a hot topic of people. Quantum entanglemant is one of the most amazing phenomenon in quantum mechanics that is totally different from classical physics. However, system would interact with environment in the practical quantum information process. The entanglement would be broken. In this paper, we study the disentanglement evolution of three spin qubits in an XY spin-chain environment. The dynamical process of the disentanglement is investigated. We found the exact expression of the coherence factor. We discuss the coherence factor and the parameters, and then we illustrate that the disentanglement of central spins is best enhanced by the quantum critical behavior of the environmental spin chain. Furthermore, a scaling rule is obtained.
Abstract Recently, there has been an increased interest in studying quantum entanglement and quantum coherence. Since both of these properties are attributed to the existence of quantum superposition, it would be useful to determine whether some type of correlation between them exists. Hence, the purpose of this paper is to explore the type of the correlation in several systems with different types of anisotropy. The focus will be on the XY spin chains with the Dzyaloshinskii–Moriya interaction and the type of the mentioned bond will be explored using the quantum renormalization group method.