118 citations · 132 across the 7 of their papers we have counts for
7 papers
Gapless and Massive 1D Singlet Dispersion Channel in Infinite Spin-1/2 Ladders ---Infinite Quasi-1D Entanglement Perturbation Theory for Excitation
Lihua Wang, Aslam Parvej, D. ChangMo Yang +1
We solve for the elementary excitation in infinite quasi-1D quantum lattices by extending the recently developed infinite quasi-1D entanglement perturbation theory. The wave functi…
Space Reduction in Matrix Product State
Lihua Wang, Kwang S. Kim
We reconstruct a matrix product state (MPS) in reduced spaces using density matrix. This scheme applies to a MPS built on a blocked quantum lattice. Each block contains physica…
Quantum Dimensional Transition in Spin- Antiferromagnetic Heisenberg Model on A Square Lattice and Space Reduction in Matrix Product State
Lihua Wang, Kwang S. Kim
We study the spin- antiferromagnetic Heisenberg model on an infinity-by- square lattice for even 's up to . Previously, the nonlinear sigma model perturbativ…
Is the molecular Berry phase an artifact of the Born-Oppenheimer approximation?
S. K. Min, A. Abedi, K. S. Kim +1
We demonstrate that the molecular Berry phase and the corresponding non-analyticity in the electronic Born-Oppenheimer wavefunction is, in general, not a true topological feature o…
Monte Carlo estimates of thermal averages and analytic continuation
Sharif D. Kunikeev, Kwang S. Kim
The Monte Carlo (MC) estimates of thermal averages are usually functions of system control parameters , such as temperature, volume, interaction couplings, etc. Given the MC ave…
Uncertainties in Gapped Graphene
Eylee Jung, Kwang S. Kim, DaeKil Park
Motivated by graphene-based quantum computer we examine the time-dependence of the position-momentum and position-velocity uncertainties in the monolayer gapped graphene. The effec…
Large Orbital Magnetic Moment and Coulomb Correlation effects in FeBr2
S. J. Youn, B. R. Sahu, Kwang S. Kim
We have performed an all-electron fully relativistic density functional calculation to study the magnetic properties of FeBr2. We show for the first time that the correlation effec…