论文标题

在驱动的Ising链中的量子淬灭

Quantum quench in a driven Ising chain

论文作者

Robinson, Neil J., Castillo, Isaac Pérez, Guzmán-González, Edgar

论文摘要

我们考虑由振荡横向磁场驱动的Ising链。对于某些参数制度,我们在问题中揭示了一个隐藏的集成结构,该结构允许在此驱动的量子系统中访问\ textIt {确切的时间进化}。我们在激活驾驶的淬火后计算时间进化的一分和两点功能。结果表明,尽管没有节能,但该模型仍未加热到无限的温度,我们进一步讨论了对一个驱动的汉密尔顿家族的概括,尽管没有综合性和混乱,但没有遭受无限温度的供暖。详细研究的特定模型还提出了一种实现外来物理学(例如E8扰动的保形场理论)的途径,该途径是通过驱动量子链中的途径,否则否则就永远无法意识到这种行为。特别是我们在数值上确认介子激发质量的比率由黄金比给出。

We consider the Ising chain driven by oscillatory transverse magnetic fields. For certain parameter regimes, we reveal a hidden integrable structure in the problem, which allows access to the \textit{exact time-evolution} in this driven quantum system. We compute time-evolved one- and two-point functions following a quench that activates the driving. It is shown that this model does not heat up to infinite temperature, despite the absence of energy conservation, and we further discuss the generalization to a family of driven Hamiltonians that do not suffer heating to infinite temperature, despite the absence of integrability and disorder. The particular model studied in detail also presents a route for realising exotic physics (such as the E8 perturbed conformal field theory) via driving in quantum chains that could otherwise never realise such behaviour. In particular we numerically confirm that the ratio of the meson excitations masses is given by the golden ratio.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源