标题： 引力混合系统中广义Wigner函数的负体积 显示英文标题

标题： Negativity volume of the generalized Wigner function in gravitating hybrid system

摘要： 我们在由处于两个局域叠加态的粒子和振子组成的混合系统中评估了广义Wigner函数的重力诱导负体积。 广义Wigner函数可以捕捉系统的非经典性。 广义Wigner函数的负体积的增加可以作为纠缠生成的指标，在各种初始状态下，该混合系统生成了重力诱导的纠缠。 此外，通过将负体积的行为与纠缠保真度进行比较，我们表明当振子初始处于热态时，基于广义Wigner函数的负体积的标准能够正确识别纠缠的非经典特性。 显示英文摘要

摘要： We evaluate the gravity-induced negativity volume of the generalized Wigner function in a hybrid system consisting of a particle in a two-localized superposition state and an oscillator. The generalized Wigner function can capture the nonclassicality of the system. The increase in the negativity volume of the generalized Wigner function can be an indicator of the entanglement generation, which is demonstrated in the hybrid system generating the gravity-induced entanglement in various initial states. Moreover, by comparing the behaviors of the negativity volume with the entanglement fidelity, we show that the nonclassical feature of entanglement is properly identified by the criterion based on the negativity volume of the generalized Wigner function when the oscillator is initially in a thermal state.