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Quantum speed limit for a three-qubit system in spin-chain environment with multisite interaction
Institution:1. Department of Physics, Harbin Institute of Technology, Harbin 150001, China;2. Department of Physics, Harbin University, Harbin 150086, China
Abstract:We study the relationship between the quantum speed limit (QSL) time of a three-qubit system, and the quantum phase transitions (QPTs) of a spin-chain environment with the three-spin interaction. We find that the three-spin interaction can effectively manipulate the critical value of the QSL time. It makes the QSL time mark more clearly the quantum phase transition of the one-dimensional spin-chain models, especially the XX model. The dynamical evolution of the QSL time presents a periodic behavior in quantum-critical environment, whereas the three-spin interaction and external magnetic field can destroy this periodicity.
Keywords:Open quantum system  Quantum speed limit  Spin chain  Three-spin interaction
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