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Browsing Physics by Author "Das, B.P."

Browsing Physics by Author "Das, B.P."

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  • Density-matrix renormalization group studies of mixture of two different ultracold bosonic atoms 
    Mishra, T.; Pai, R.V.; Das, B.P. (Journal of Physics: Conference Series. 80; 2007; Article ID 012039)
    We investigate the ground state phase diagram for a two species Bose mixture in a one dimensional optical lattice using the finite size density matrix renormalization group (FSDMRG) method. We present our result for different ...
  • Hard-core bosons in a zig-zag optical superlattice 
    Dhar, A.; Mishra, T.; Pai, R.V.; Mukerjee, S.; Das, B.P. (Physical Review A. 88(5); 2013; Article No. 053625 .)
    We study a system of hard-core bosons at half-filling in a one-dimensional optical superlattice. The bosons are allowed to hop to nearest- and next-nearest-neighbor sites. We obtain the ground-state phase diagram as a ...
  • Induced supersolidity in a mixture of normal and hard-core bosons 
    Mishra, T.; Pai, R.V.; Das, B.P. (Physical Review B. 81(2); 2010; Article ID: 024503.)
    We present a scenario where a supersolid is induced in one of the components of a mixture of two species bosonic atoms where there are no long-range interactions. We study a system of normal and hard-core boson mixture ...
  • Mean-field analysis of quantum phase transitions in a periodic optical superlattice 
    Dhar, A.; Singh, M.; Pai, R.V.; Das, B.P. (Physical Review A. 84(3); 2011; Article ID: 033631.)
    We analyze the various phases exhibited by a system of ultracold bosons in a periodic optical superlattice using the mean-field decoupling approximation. We investigate for a wide range of commensurate and incommensurate ...
  • Phase diagram of a bosonic ladder with two coupled chains 
    Luthra, M.S.; Mishra, T.; Pai, R.V.; Das, B.P. (Physical Review B. 78(16); 2008; Article ID: 165104)
    We study a bosonic ladder with two coupled chains using the finite-size density-matrix renormalization group method. We show that in a commensurate bosonic ladder the critical on-site interaction (U(C)) for the superfluid ...
  • Phase separation in a two-species Bose mixture 
    Mishra, T.; Pai, R.V.; Das, B.P. (Physical Review A. 76(1); 2007; Article ID: 013604.)
    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 ...
  • Quantum phases of attractive bosons on a Bose-Hubbard ladder with three-body constraint 
    Singh, M.; Mishra, T.; Pai, R.V.; Das, B.P. (Physical Review A. 90(1); 2014; Article No. 013625.)
    We obtain the complete quantum phase diagram of bosons on a two-leg ladder in the presence of attractive onsite and repulsive interchain nearest-neighbor interactions by imposing the onsite three-body constraint. We find ...
  • Quantum phases of ultracold bosonic atoms in a one-dimensional optical superlattice 
    Dhar, A.; Mishra, T.; Pai, R.V.; Das, B.P. (Physical Review A. 83(5); 2011; Article ID: 053621.)
    We analyze various quantum phases of ultracold bosonic atoms in a periodic one-dimensional optical superlattice. Our studies have been performed using the finite-size density-matrix renormalization group method in the ...
  • Signatures of the superfluid-to-Mott-insulator transition in cold bosonic atoms in a one-dimensional optical lattice 
    Ramanan, S.; Mishra, T.; Luthra, M.S.; Pai, R.V.; Das, B.P. (Physical Review A. 79(1); 2009; Article ID: 013625.)
    We study the Bose-Hubbard model using the finite size density matrix renormalization group method. We obtain a complete phase diagram for a system in the presence of a harmonic trap and compare it with that of the homogeneous ...
  • Supersolid and solitonic phases in the one-dimensional extended Bose-Hubbard model 
    Mishra, T.; Pai, R.V.; Ramanan, S.; Luthra, M.S.; Das, B.P. (Physical Review A. 80(4); 2009; Article ID: 043614.)
    We report our findings on the quantum phase transitions in cold bosonic atoms in a one-dimensional optical lattice using the finite-size density-matrix renormalization-group method in the framework of the extended Bose-Hubbard ...
  • Three-body on-site interactions in ultracold bosonic atoms in optical lattices and superlattices 
    Singh, M.; Dhar, Arya; Mishra, T.; Pai, R.V.; Das, B.P. (Physical Review A. 85(5); 2012; Article ID: 051604(R).)
    The Mott-insulator-superfluid transition for ultracold bosonic atoms in an optical lattice has been extensively studied in the framework of the Bose-Hubbard model with two-body on-site interactions. We analyze the additional ...

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