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Correlated exciton transport in Rydberg-dressed-atom spin chains

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...

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Main Authors: Schempp, Hanna (Author) , Günter, Georg (Author) , Wüster, S. (Author) , Weidemüller, Matthias (Author) , Whitlock, Shannon (Author)
Format: Article (Journal)
Language:English
Published: 26 August 2015
In: Physical review letters
Year: 2015, Volume: 115, Issue: 9
ISSN:1079-7114
DOI:10.1103/PhysRevLett.115.093002
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.115.093002
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.115.093002
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Author Notes:H. Schempp, G. Günter, S. Wüster, M. Weidemüller, and S. Whitlock

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520 |a 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. 
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