Exact three-colored quantum scars from geometric frustration

K Lee, R Melendrez, A Pal, HJ Changlani - Physical Review B, 2020 - APS
Nonequilibrium properties of quantum materials present many intriguing properties, among
them athermal behavior, which violates the eigenstate thermalization hypothesis. Such …

Circuit quantum electrodynamics in hyperbolic space: from photon bound states to frustrated spin models

P Bienias, I Boettcher, R Belyansky, AJ Kollár… - Physical Review Letters, 2022 - APS
Circuit quantum electrodynamics is one of the most promising platforms for efficient quantum
simulation and computation. In recent groundbreaking experiments, the immense flexibility …

[图书][B] Density Matrix and Tensor Network Renormalization

T Xiang - 2023 - books.google.com
Renormalization group theory of tensor network states provides a powerful tool for studying
quantum many-body problems and a new paradigm for understanding entangled structures …

Signatures of a Spin- Cooperative Paramagnet in the Diluted Triangular Lattice of

S Kundu, A Hossain, R Das, M Baenitz, PJ Baker… - Physical review …, 2020 - APS
We present a combination of thermodynamic and dynamic experimental signatures of a
disorder driven dynamic cooperative paramagnet in a 50% site diluted triangular lattice spin …

From real materials to model hamiltonians with density matrix downfolding

H Zheng, HJ Changlani, KT Williams… - Frontiers in …, 2018 - frontiersin.org
Due to advances in computer hardware and new algorithms, it is now possible to perform
highly accurate many-body simulations of realistic materials with all their intrinsic …

[HTML][HTML] Density-matrix based determination of low-energy model Hamiltonians from ab initio wavefunctions

HJ Changlani, H Zheng, LK Wagner - The Journal of chemical physics, 2015 - pubs.aip.org
We propose a way of obtaining effective low energy Hubbard-like model Hamiltonians from
ab initio quantum Monte Carlo calculations for molecular and extended systems. The …

Colorful points in the XY regime of XXZ quantum magnets

S Pal, P Sharma, HJ Changlani, S Pujari - Physical Review B, 2021 - APS
In the XY regime of the XXZ Heisenberg model phase diagram, we demonstrate that the
origin of magnetically ordered phases is influenced by the presence of solvable points with …

Constructing Hubbard models for the hydrogen chain using sliced-basis density matrix renormalization group

RC Sawaya, SR White - Physical Review B, 2022 - APS
Sliced-basis DMRG (sb-DMRG) is used to simulate a chain of hydrogen atoms and to
construct low-energy effective Hubbard-like models. The downfolding procedure first …

Dulmage-mendelsohn percolation: Geometry of maximally packed dimer models and topologically protected zero modes on site-diluted bipartite lattices

R Bhola, S Biswas, MM Islam, K Damle - Physical Review X, 2022 - APS
The classic combinatorial construct of maximum matchings probes the random geometry of
regions with local sublattice imbalance in a site-diluted bipartite lattice. We demonstrate that …

Criticality and Mott glass phase in a disordered two-dimensional quantum spin system

N Ma, AW Sandvik, DX Yao - Physical Review B, 2014 - APS
We use quantum Monte Carlo simulations to study a disordered S= 1/2 Heisenberg quantum
spin model with three different nearest-neighbor interactions, J 1≤ J 2≤ J 3, on the square …