Dynamical crystal creation with polar molecules or Rydberg atoms in optical lattices - Condensed Matter > Quantum GasesReportar como inadecuado




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Abstract: We investigate the dynamical formation of crystalline states with systems ofpolar molecules or Rydberg atoms loaded into a deep optical lattice. Externalfields in these systems can be used to couple the atoms or molecules betweentwo internal states: one that is weakly interacting and one that exhibits astrong dipole-dipole interaction. By appropriate time variation of the externalfields, we show that it is possible to produce crystalline states of thestrongly interacting states with high filling fractions chosen via theparameters of the coupling. We study the coherent dynamics of this process inone dimension 1D using a modified form of the time-evolving block decimationTEBD algorithm, and obtain crystalline states for system sizes and parameterscorresponding to realistic experimental configurations. For polar moleculesthese crystalline states will be long-lived, assisting in a characterization ofthe state via the measurement of correlation functions. We also show that asthe coupling strength increases in the model, the crystalline order is broken.This is characterized in 1D by a change in density-density correlationfunctions, which decay to a constant in the crystalline regime, but showdifferent regions of exponential and algebraic decay for larger couplingstrengths.



Autor: J. Schachenmayer, I. Lesanovsky, A. Micheli, A. J. Daley

Fuente: https://arxiv.org/







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