Quantum spinon oscillations in a finite one-dimensional transverse Ising model
Quantum spinon oscillations in a finite one-dimensional transverse Ising model
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DOI：
10.1103/physrevb.83.155119
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发表时间：
2011-02
影响因子：
3.7
通讯作者：
Zi Cai;Lei Wang;Xincheng Xie;U. Schollwöck;Xiangrong Wang;M. Ventra;Yupeng Wang
中科院分区：
文献类型：
--
作者：
Zi Cai;Lei Wang;Xincheng Xie;U. Schollwöck;Xiangrong Wang;M. Ventra;Yupeng Wang
在微正则输运图下，利用时间演化块抽取（TEBD）方法研究了外磁场作用下自旋子的全量子动力学。我们证明了在没有耗散的情况下，自旋子的中心来回振荡。量子多体行为可以在传输和布洛赫振荡（BO）的单粒子图像中理解，其中量子波动引起有限的寿命。输运、振荡和寿命可以在一定程度上分别由外场调节。其他非平凡的动力学，如共振和混沌，也进行了讨论。
The full quantum dynamics of a spinon under external magnetic fields is investigated by using the time-evolving block decimation (TEBD) method within the microcanonical picture of transport. We show that the center of the spinon oscillates back and forth in the absence of dissipation. The quantum many-body behavior can be understood in a single-particle picture of transport and Bloch oscillations (BOs), where quantum fluctuations induce finite lifetimes. Transport, oscillations, and lifetimes can be tuned to some degree separately by external fields. Other nontrivial dynamics, such as resonance and chaos, are also discussed.