3 papers
physics.comp-ph2019
Calculating the divided differences of the exponential function by addition and removal of inputs
Lalit Gupta, Lev Barash, Itay Hen
We introduce a method for calculating the divided differences of the exponential function by means of addition and removal of items from the input list to the function. Our techniq…
quant-ph2019
Elucidating the interplay between non-stoquasticity and the sign problem
Lalit Gupta, Itay Hen
The sign problem is a key challenge in computational physics, encapsulating our inability to properly understand many important quantum many-body phenomena in physics, chemistry an…
cond-mat.stat-mech2019
Permutation Matrix Representation Quantum Monte Carlo
Lalit Gupta, Tameem Albash, Itay Hen
We present a quantum Monte Carlo algorithm for the simulation of general quantum and classical many-body models within a single unifying framework. The algorithm builds on a power…