Momentum Distribution in a One-Dimensional Bose–Hubbard Model at Incommensurate Fillings

Original Paper


We study the momentum distribution of the hard-core extended Bose–Hubbard model at incommensurate fillings in one dimension. From the finite-size scaling behavior of the zero-momentum occupancy, the Luttinger liquid parameters are obtained as a function of interaction strength and filling. The curvature of the momentum distribution shows distinction between the easy-plane and the easy-axis region, and the occupancy at the zone boundary indicates the filling fraction.


Momentum distribution Luttinger liquid Superfluid–insulator transition 


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Department of Applied PhysicsHanyang UniversityAnsanKorea

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