title: Nuclear quantum dynamics in dense hydrogen.
abstract: Nuclear dynamics in dense hydrogen, which is determined by the key physics of large-angle scattering or many-body collisions between particles, is crucial for the dynamics of planet's evolution and hydrodynamical processes in inertial confinement confusion. Here, using improved ab initio path-integral molecular dynamics simulations, we investigated the nuclear quantum dynamics regarding transport behaviors of dense hydrogen up to the temperatures of 1 eV. With the inclusion of nuclear quantum effects (NQEs), the ionic diffusions are largely higher than the classical treatment by the magnitude from 20% to 146% as the temperature is decreased from 1 eV to 0.3 eV at 10 g/cm(3), meanwhile, electrical and thermal conductivities are significantly lowered. In particular, the ionic diffusion is found much larger than that without NQEs even when both the ionic distributions are the same at 1 eV. The significant quantum delocalization of ions introduces remarkably different scattering cross section between protons compared with classical particle treatments, which explains the large difference of transport properties induced by NQEs. The Stokes-Einstein relation, Wiedemann-Franz law, and isotope effects are re-examined, showing different behaviors in nuclear quantum dynamics.
authors: Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China.
authors: Dongdong
authors: D
authors: Kang
authors: Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China.
authors: Huayang
authors: H
authors: Sun
authors: Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China.
authors: Jiayu
authors: J
authors: Dai
authors: Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China.
authors: Wenbo
authors: W
authors: Chen
authors: Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China.
authors: Zengxiu
authors: Z
authors: Zhao
authors: Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China.
authors: Yong
authors: Y
authors: Hou
authors: Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China.
authors: Jiaolong
authors: J
authors: Zeng
authors: 1] Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China [2] State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073, Hunan, People's Republic of China.
authors: Jianmin
authors: J
authors: Yuan