Transitionless driving on local adiabatic quantum search algorithm
Feng‐Guang Li, Wan‐Su Bao, Shuo Zhang, Xiang Wang, He-Liang Huang, Tan Li, Bo-wen Ma · Chinese Physics B · 2018
We apply the transitionless driving on the local adiabatic quantum search algorithm to speed up the adiabatic process. By studying quantum dynamics of the adiabatic search algorithm with the equivalent two-level system, we derive the transitionless driving Hamiltonian for the local adiabatic quantum search algorithm. We found that when adding a transitionless quantum driving term H D ( t ) on the local adiabatic quantum search algorithm, the success rate is 1 exactly with arbitrary evolution time by solving the time-dependent Schr¨odinger equation in eigen-picture. Moreover, we show the reason for the drastic decrease of the evolution time is that the driving Hamiltonian increases the lowest eigenvalues to a maximum of O ( N ) .