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Browsing Physics by Author "Pai, R.V."

Browsing Physics by Author "Pai, R.V."

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  • 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 ...
  • Random phase approximation and cluster mean field studies of hard core Bose Hubbard model 
    Alavani, B.K.; Gaude, P.P.; Pai, R.V. (AIP Conference Proceedings. 1942(1); 2018; ArticleID_030005.)
    We investigate zero temperature and finite temperature properties of the Bose Hubbard Model in the hard core limit using Random Phase Approximation (RPA) and Cluster Mean Field Theory (CMFT). We show that our RPA calculations ...
  • 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 ...
  • Spectral weight of excitations in Bose Hubbard model 
    Alavani, B.K.; Pai, R.V. (AIP Conference Proceedings. 1832; 2017; Article ID 030009.)
    We obtain excitation spectra in the superfluid and the Mott Insulator phases of Bose Hubbard model near unit filling within Random Phase Approximation (RPA) and calculate its spectral weight. This gives a transparent ...
  • Spin-1 bosons in optical superlattice 
    Gaonker, C.G.F.; Alavani, B.K.; Das, A.; Pai, R.V. (AIP Conference Proceedings. 2115(1); 2019; ArticleID_030016.)
    In this paper, we analyze superfluid, insulator and various magnetic phases of ultracold spin-1 bosonic atoms in two-dimensional optical superlattices. Our studies have been performed using Cluster Mean Field Theory. ...
  • Superfluid, Mott-insulator, and mass-density-wave phases in the one-dimensional extended Bose-Hubbard model 
    Pai, R.V.; Pandit, Rahul (Physical Review B. 71(10); 2005; Article ID: 104508.)
    We use the finite-size, density-matrix-renormalization-group (FSDMRG) method to obtain the phase diagram of the one-dimensional (d=1) extended Bose-Hubbard model for density rho=1 in the U-V plane, where U and V are, ...
  • 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 ...
  • Supersolid in a one-dimensional model of hard-core bosons 
    Mishra, T.; Pai, R.V.; Mukerjee, S. (Physical Review A. 89(1); 2014; Article No. 013615.)
    We study a system of hard-core boson on a one-dimensional lattice with frustrated next-nearest-neighbor hopping and nearest-neighbor interaction. At half filling, for equal magnitude of nearest- and next-nearest-neighbor ...
  • 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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