Speaker
Benjamin Schiffer
(MPQ)
Description
Preparing the ground state of a Hamiltonian is a problem of great significance in physics with deep implications in the field of combinatorial optimization. We propose a variational quantum adiabatic algorithm (VQAA) for optimized adiabatic paths. We aim at combining the strengths of the adiabatic and the variational approaches for fast and high-fidelity ground state preparation. Our algorithms build upon ancilla protocols which we present that allow to directly evaluate the ground state overlap. We benchmark for a non-integrable spin-1/2 chain with N=53 sites using tensor network techniques. Using a gradient-based approach, we report a reduction in the total evolution time by a factor of ten.
Primary author
Benjamin Schiffer
(MPQ)
Co-authors
Prof.
Ignacio Cirac
(MPQ)
Dr
Jordi Tura
(Leiden University)
