2006/10/31 by Tapan Mishra, T. Mishra, Ramesh V. Pai +1 · 3 citations
Physics and Astronomy · #Bose–Hubbard model #Boson #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Density matrix renormalization group #Ground state #Lattice (music) #Materials science #Mott insulator #Optical lattice #Phase (matter) #Phase diagram #Physics #Quantum #Quantum many-body systems #Quantum mechanics #Quantum, superfluid, helium dynamics #Superfluidity #cond-mat.other #cond-mat.stat-mech
paper · pdf · doi:10.1103/physreva.76.013604
published as Phys. Rev. A 76, 013604 (2007) (6 pages) · 7 pages, 7 figures
openalex publication_date 2007/07/03 · arxiv created 2007/07/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We obtain the ground-state quantum phase diagram for a two-species Bose mixture in a one-dimensional optical lattice using the finite-size density-matrix renormalization group method. We discuss our results for different combinations of inter- and intraspecies interaction strengths with commensurate and incommensurate fillings of the bosons. The phases we have obtained are a superfluid and a Mott insulator, and a phase separation where the two different species reside in spatially separate regions. The spatially separated phase is further classified into phase-separated superfluid and Mott insulator. The phase separation appears for all the fillings we have considered, whenever the interspecies interaction is slightly larger than the intraspecies interactions.