The one-dimensional extended Bose-Hubbard model

Journal of Chemical Sciences

Ramesh V Pai²  Rahul Pandit2 3¹ 

[1] Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560 012, India$$;Department of Physics, Goa University, Goa 403 206, India$$

关键词: Boson systems;    quantum statistical theory;    ground state;    elementary excitations;    other topics in quantum fluids and solids;    liquid and solid helium.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

We use the finite-size, density-matrix-renormalization-group (DMRG) method to obtain the zero-temperature phase diagram of the one-dimensional, extended Bose-Hubbard model, for mean boson density ρ = 1, in the 𝑈-𝑉 plane (𝑈 and 𝑉 are respectively, onsite and nearest-neighbour repulsive interactions between bosons). The phase diagram includes superfluid (SF), bosonic-Mott-insulator (MI), and mass-density-wave (MDW) phases. We determine the natures of the quantum phase transitions between these phases.

【 授权许可】

Unknown