Correlated Exciton Transport in Rydberg-Dressed-Atom Spin Chains.
Correlated Exciton Transport in Rydberg-Dressed-Atom Spin Chains.
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DOI：
10.1103/physrevlett.115.093002
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发表时间：
2015-04
影响因子：
8.6
通讯作者：
H. Schempp;G. Günter;S. Wüster;M. Weidemüller;Shannon Whitlock
中科院分区：
文献类型：
--
作者：
H. Schempp;G. Günter;S. Wüster;M. Weidemüller;Shannon Whitlock
我们研究了通过耦合到额外的短寿命态引入非局域耗散的原子链的激发传输。该系统是由一个有效的自旋-1/2模型，其中的交换相互作用强度的比水库耦合强度确定的类型的运输，包括相干激子运动，非相干跳跃，和一个制度，在该制度中，一个紧急的长度尺度导致一个优选的跳跃距离远远超过最近的邻居。对于多个杂质，耗散引起强烈的最近邻关联和纠缠。这些结果突出了非平凡的耗散，相关性和多体效应在最近的实验中的偶极介导的里德堡激发的运输的重要性。
We investigate the transport of excitations through a chain of atoms with nonlocal dissipation introduced through coupling to additional short-lived states. The system is described by an effective spin-1/2 model where the ratio of the exchange interaction strength to the reservoir coupling strength determines the type of transport, including coherent exciton motion, incoherent hopping, and a regime in which an emergent length scale leads to a preferred hopping distance far beyond nearest neighbors. For multiple impurities, the dissipation gives rise to strong nearest-neighbor correlations and entanglement. These results highlight the importance of nontrivial dissipation, correlations, and many-body effects in recent experiments on the dipole-mediated transport of Rydberg excitations.