15 citations · 34 across the 10 of their papers we have counts for
10 papers
Quantum annealing in SU(3) multiplet space with nonlocal drivers
Yang Wei Koh
A theoretical framework for quantum annealing based on algebra is proposed, and applied to the problem of overcoming first-order transitions in rugged energy lan…
Box model of quantum annealing
Yang Wei Koh, Youjin Deng
A particle-in-a-box model of continuous space quantum annealing is proposed and studied numerically by solving the Schrödinger wave equation directly. Three types of energy landsca…
Correspondence between excited energy eigenstates and local minima of energy landscape in quantum spin systems
Yang Wei Koh
The quantum-classical correspondence between local minima on the classical energy landscape and excited eigenstates in the energy spectrum is studied within the context of many-bod…
Quantum and classical annealing in a continuous space with multiple local minima
Yang Wei Koh, Hidetoshi Nishimori
The protocol of quantum annealing is applied to an optimization problem with a one-dimensional continuous degree of freedom, a variant of the problem proposed by Shinomoto and Kaba…
Reduction of the energy-gap scaling by coherent catalysis in models of quantum annealing
Yang Wei Koh, Hidetoshi Nishimori
Non-stoquastic drivers are known to improve the performance of quantum annealing by reducing first-order phase transitions into second-order ones in several mean-field-type model s…
Effects of dynamical paths on the energy gap and the corrections to free energy in path integrals of mean-field quantum spin systems
Yang Wei Koh
In current studies of mean-field quantum spin systems, much attention is placed on the calculation of the ground-state energy and the excitation gap, especially the latter which pl…
Non-static effects in ordered and disordered quantum spin systems I: theoretical formulation, energy gap and non-extensive terms of ground-state energy of the ferromagnetic Ising model in a transverse field
Yang Wei Koh
In the path integral formulation of the partition function of quantum spin models, most current treatments employ the so-called static approximation to simplify the process of summ…
Effects of low-lying excitations on ground-state energy and energy gap of Sherrington-Kirkpatrick model in transverse field
Yang Wei Koh
We present an extensive numerical study of the Sherrington-Kirkpatrick model in transverse field. Recent numerical studies of quantum spin-glasses have focused on exact diagonaliza…
Dynamical traps in Wang-Landau sampling of continuous systems: Mechanism and solution
Yang Wei Koh, Adelene Y. L. Sim, Hwee Kuan Lee
We study the mechanism behind dynamical trappings experienced during Wang-Landau sampling of continuous systems reported by several authors. Trapping is caused by the random walker…
Dynamically Optimized Wang-Landau Sampling with Adaptive Trial Moves and Modification Factors
Yang Wei Koh, Hwee Kuan Lee, Yutaka Okabe
The density of states of continuous models is known to span many orders of magnitudes at different energies due to the small volume of phase space near the ground state. Consequent…