DMRG studies of hydrogen chains using sliced and gausslet bases.
Time: 12:30 PM (Taipei time)
Venue: Online Zoom [Registration] is required
Speaker: Steven R. White (University of California, Irvine)
Title: DMRG studies of hydrogen chains using sliced and gausslet bases.
Abstract: The density matrix renormalization group works because of the area law of the entanglement entropy. When using DMRG in electronic structure, a non-local basis can artificially give an area law ground state a volume law entropy. Here we report on two approaches to generating localized bases for use with DMRG. Along with reduced entanglement, the localized bases also generate diagonal two-electron interaction Hamiltonians, greatly improving the computational scaling. A sliced basis uses a grid in one dimension with gaussian bases in the two transverse directions. Gausslet bases utilize a distorted 3D grid, where at every gridpoint a special wavelet-inspired basis function produces the diagonal property. I will report on our latest developments in these areas.
Zoom Link: https://us02web.zoom.us/j/87189337581?pwd=SkRxTFBzTDdobW5qSE1idGVkeURHZz09