标题： 施瓦茨希尔德黑洞霍金效应下W态的真实三重纠缠 显示英文标题

标题： Genuine tripartite entanglement of W state subject to Hawking effect of a Schwarzschild black hole

摘要： 我们研究了在史瓦西黑洞背景下的费米场W态的真实三重纠缠（GTE）、一纠缠和二纠缠。 我们发现，随着霍金温度的增加，W态的GTE先减少然后趋于零，而GHZ态的GTE先减少然后冻结。 我们还发现，霍金效应可以完全破坏W态的二纠缠，而一纠缠随着霍金温度的增加先减少然后出现冻结现象。 这些结果有助于指导我们选择适当的量子态和量子资源来处理相对论量子信息任务。 显示英文摘要

摘要： We study the genuine tripartite entanglement (GTE), one-tangle and two-tangle of W state of fermionic fields in the background of a Schwarzschild black hole. We find that, with the increase of the Hawking temperature, the GTE of W state first decreases and then tends to zero, while the GTE of GHZ state first decreases and then freezes. We also find that the Hawking effect can completely destroy the two-tangle of W state, whilie one-tangle first decreases and then appears freezing phenomenon with the growth of the Hawking temperature. These results are helpful to guide us to select appropriate quantum states and quantum resources to deal with relativistic quantum information tasks.