论文标题
量子质量晶体的顺序参数的量子波动
Quantum fluctuations in the order parameter of quantum skyrmion crystals
论文作者
论文摘要
传统上，天空被视为具有定义明确的拓扑天空数的古典旋转的连续磁纹理。由于它们的拓扑保护，Skyrmions引起了人们对未来记忆技术的基础的极大兴趣。较小的天空提供了更大的记忆密度，但是，对于仅几个晶格常数的天空，量子效应并不能忽略不计。在本文中，我们研究了密集的天空晶体基态周围的量子波动，并着重于量子天空的离散阶订单参数的实用性。发现该顺序参数是量子天空存在的有用指标，并捕获了两个不同的天空相之间的量子相变。
Traditionally, skyrmions are treated as continuum magnetic textures of classical spins with a well-defined topological skyrmion number. Owing to their topological protection, skyrmions have attracted great interest as building blocks in future memory technology. Smaller skyrmions offer greater memory density, however, quantum effects are not negligible for skyrmions with sizes of just a few lattice constants. In this paper we study quantum fluctuations around dense skyrmion crystal ground states, and focus on the utility of a discretized order parameter for quantum skyrmions. The order parameter is found to be a useful indicator of the existence of quantum skyrmions, and captures the quantum phase transition between two distinct skyrmion phases.
