论文标题
量子超冷液体中的结构放松：一种模式耦合方法
Structural relaxation in quantum supercooled liquids: A mode-coupling approach
论文作者
论文摘要
我们使用量子模式耦合公式研究量子硬球液体中的超冷动力学。在中等量子状态下，与强量子状态相比，经典的笼子效应导致动力学较慢，在这种量子状态下，隧道胜过经典的笼子，导致更快的松弛。结果，玻璃过渡临界密度可以显着高于经典液体。扰动方法用于求解依赖时间的量子模式耦合方程，以详细研究中等冷冻液体在中等量子状态下的动力学。与经典案例相似，松弛时间显示了超冷方案中密度增加的力量增加。但是，发现幂律指数取决于量子。随着中等量子状态中量子的增加，它会线性增加。
We study supercooled dynamics in quantum hard-sphere liquid using quantum mode-coupling formulation. In the moderate quantum regime, classical cage effects lead to slower dynamics compared to strongly quantum regime, where tunneling overcomes classical caging, leading to faster relaxation. As a result, the glass transition critical density can become significantly higher than for the classical liquids. Perturbative approach is used to solve time dependent quantum mode-coupling equations to study in detail the dynamics of the supercooled liquid in moderate quantum regime. Similar to the classical case, relaxation time shows power-law increase with increasing density in the supercooled regime. However, the power-law exponent is found to be dependent on the quantumness; it increases linearly as the quantumness is increased in the moderate quantum regime.
