4 papers · 1 filter
Symmetrized DMRG studies of the properties of Low-lying states of Poly-para-phenylene (PPP) system
Y. Anusooya, Swapan K. Pati, S. Ramasesha
We report the symmetrized density matrix renormalization group (DMRG) study of neutral and doped oligomers of PPP system within an extended Hubbard model. Model parameters are dete…
The Density Matrix Renormalization Group Studies of Metal-Halogen Chains within a Two-Band Extended Peierls-Hubbard Model
Y. Anusooya, Swapan K Pati, S. Ramasesha
The phase diagram of halogen-bridged mixed-valent metal complexes () has been studied using a two-band extended Peierls-Hubbard model employing the recently developed Density M…
Dynamical Nonlinear Optic Coefficients from the Symmetrized Density Matrix Renormalization Group Method
Swapan K. Pati, S. Ramasesha, Z. Shuai +1
We extend the symmetrized density matrix renormalization group (SDMRG) method to compute the dynamic nonlinear optic coefficients for long chains. By computing correction vectors i…
Symmetrized DMRG Method for Excited States of Hubbard Models
S. Ramasesha, Swapan K. Pati, H. R. Krishnamurthy +2
We extend the density matrix renormalization group method to exploit Parity, (rotation by ) and electron-hole symmtries of model Hamiltonians. We demonstrate the power of…