Density-dependent synthetic gauge fields using periodically modulated interactions.

作者: S. Greschner , G. Sun , D. Poletti , L. Santos

DOI: 10.1103/PHYSREVLETT.113.215303

关键词: Gauge theoryGauge bosonMott insulatorInsulator (electricity)Condensed matter physicsSuperfluidityQuantum mechanicsDensity dependentPhysicsHamiltonian lattice gauge theoryTime of flight

摘要: We show that density-dependent synthetic gauge fields may be engineered by combining periodically modulated interactions and Raman-assisted hopping in spin-dependent optical lattices. These lead to a shift of the momentum distribution, induce superfluid-to-Mott insulator transitions, strongly modify correlations superfluid regime. interplay between created field broken sublattice symmetry results, as well, an intriguing behavior at vanishing interactions, characterized appearance fractional Mott insulator.

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