论文标题
朝阳量子量模型中的破坏性和能量流
Decoherence and energy flow in the sunburst quantum Ising model
论文作者
论文摘要
我们研究了由横向场量子iSing环组成的量子阳光旋转模型的季后单位动力学，该模型突然沿纵向沿纵向的一组独立的外粒子耦合，以尊重残留的平移不变性和ISing $ \ Mathbb {z} _2 _2 _2 $ symetry。从系统的不同平衡量子阶段开始，我们表征了外部Qubits中的脱碳和能量存储，这可以解释为内部Ising环的探测器。我们的结果表明，在近端环的量子过渡的附近，无论是一阶还是连续的，都可以提出动态FSS框架，这些FSS框架揭示了特定的缩放制度，这取决于采取大型限制的方式：通过修复调查数量$ n $ n $ n $ n $ n $ n $ n $ n $ n $ n $ n $ n $。无论如何，各种观察力对$ n $的依赖性可以通过$ \ sqrt {n} $ prefactor重新定义淬灭参数重新定义。我们还谈到了外部Qubits之间最近的邻居耦合的作用。
We study the post-quench unitary dynamics of a quantum sunburst spin model, composed of a transverse-field quantum Ising ring which is suddenly coupled to a set of independent external qubits along the longitudinal direction, in a way to respect a residual translation invariance and the Ising $\mathbb{Z}_2$ symmetry. Starting from the different equilibrium quantum phases of the system, we characterize the decoherence and the energy storage in the external qubits, which may be interpreted as a probing apparatus for the inner Ising ring. Our results show that, in proximity of the quantum transitions of the Ising ring, either first-order or continuous, it is possible to put forward dynamic FSS frameworks which unveil peculiar scaling regimes, depending on the way in which the large-size limit is taken: either by fixing the number $n$ of probing qubits, or their interspace distance $b$. In any case, the dependence of the various observables on $n$ can be reabsorbed into a redefinition of the quench parameter by a $\sqrt{n}$ prefactor. We also address the role of a nearest-neighbor coupling between the external qubits.
