arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2006.11299cond-mat.stat-mech
收藏

时间周期线性势场中一维量子多体系统的动力学

Dynamics of one-dimensional quantum many-body systems in time-periodic linear potentials

Andrea Colcelli, Giuseppe Mussardo, German Sierra, Andrea Trombettoni

摘要:

本文研究了一维相互作用量子粒子系统在空间线性势作用下的动力学行为。在讨论了受驱动的单粒子和双粒子系统的情况后,我们在一般相互作用两体势和相应的Floquet哈密顿量的存在下,得到了多粒子系统的类似结果。当非驱动模型是可积的,Floquet Hamitlonian被证明是可积的。我们确定的微运动运营商和一个通用的时间演化状态的系统的表达。我们讨论了在频闪和中间时间的系统的动力学的各个方面,特别是一个通用波包的质量质心的运动及其随时间的传播。我们还讨论了线性势的系数强度在一个时间段上的积分不为零时,质心的加速运动的情形,并证明了Floquet哈密顿量在这种情形下得到一个附加的静态线性势。我们还讨论了应用所获得的结果的Lieb-Liniger模型。

英文摘要:

We study a system of one-dimensional interacting quantum particles subjected to a time-periodic potential linear in space. After discussing the cases of driven one- and two-particles systems, we derive the analogous results for the many-particles case in presence of a general interaction two-body potential and the corresponding Floquet Hamiltonian. When the undriven model is integrable, the Floquet Hamitlonian is shown to be integrable too. We determine the micro-motion operator and the expression for a generic time evolved state of the system. We discuss various aspects of the dynamics of the system both at stroboscopic and intermediate times, in particular the motion of the center of mass of a generic wavepacket and its spreading over time. We also discuss the case of accelerated motion of the center of mass, obtained when the integral of the coeffcient strenght of the linear potential on a time period is non-vanishing, and we show that the Floquet Hamiltonian gets in this case an additional static linear potential. We also discuss the application of the obtained results to the Lieb-Liniger model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑