Adiabatic dynamics in a spin-1 chain with uniaxial single-spin anisotropy
Adiabatic dynamics in a spin-1 chain with uniaxial single-spin anisotropy
复制标题
具有单轴单自旋各向异性的 spin-1 链中的绝热动力学
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
G. Santoro
中科院分区：
文献类型：
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作者：
Elena Canovi;D. Rossini;R. Fazio;G. Santoro
我们研究了二阶量子相变中各向异性 spin-1 XY 链的绝热量子动力学。通过对单轴单自旋各向异性进行淬火，使系统失去平衡，该各向异性应该随时间线性变化。我们表明，对于足够大的系统尺寸，淬灭后的过剩能量会产生非平凡的缩放行为，这种缩放行为无法通过孤立临界点或扩展临界区域的标准 Kibble-Zurek 论证来预测。这是由于在整个连续的临界点线内许多可接近的低位激发态的竞争效应而产生的。
We study the adiabatic quantum dynamics of an anisotropic spin-1 XY chain across a second-order quantum phase transition. The system is driven out of equilibrium by performing a quench on the uniaxial single-spin anisotropy, that is supposed to vary linearly in time. We show that, for sufficiently large system sizes, the excess energy after the quench admits a non-trivial scaling behavior that is not predictable by standard Kibble–Zurek arguments for isolated critical points or extended critical regions. This emerges from a competing effect of many accessible low-lying excited states, inside the whole continuous line of critical points.
影响因子：
8.6
作者：
Manmana, S. R.;Wessel, S.;Muramatsu, A.
通讯作者：
Muramatsu, A.