Gessner Manuel, Schlawin Frank, Buchleitner Andreas
Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany.
J Chem Phys. 2015 Jun 7;142(21):212439. doi: 10.1063/1.4919796.
We devise a phase-coherent three-pulse protocol to probe the polariton dynamics in a trapped-ion quantum simulation. In contrast to conventional nonlinear signals, the presented scheme does not change the number of excitations in the system, allowing for the investigation of the dynamics within an N-excitation manifold. In the particular case of a filling factor one (N excitations in an N-ion chain), the proposed interaction induces coherent transitions between a delocalized phonon superfluid and a localized atomic insulator phase. Numerical simulations of a two-ion chain demonstrate that the resulting two-dimensional spectra allow for the unambiguous identification of the distinct phases, and the two-dimensional line shapes efficiently characterize the relevant decoherence mechanism.
我们设计了一种相位相干三脉冲协议，以探测捕获离子量子模拟中的极化激元动力学。与传统的非线性信号不同，所提出的方案不会改变系统中的激发数，从而能够研究N激发流形内的动力学。在填充因子为1的特殊情况下（N离子链中有N个激发），所提出的相互作用会在离域声子超流体和局域原子绝缘体相之间诱导相干跃迁。对双离子链的数值模拟表明，所得的二维光谱能够明确识别不同的相，并且二维线形有效地表征了相关的退相干机制。
