Dan-Bo Zhang

Collective optimization for variational quantum eigensolvers

2020 · Physical Review A

A variational quantum eigensolver (VQE) optimizes parametrized eigenstates of a Hamiltonian on a quantum processor by updating parameters with a classical computer. Such a hybrid quantum-classical optimization serves as a practical way to leverage classical …

Variational quantum simulation of the quantum critical regime

2023 · Chinese Physics B

The quantum critical regime marks a zone in the phase diagram where quantum fluctuation around the critical point plays a significant role at finite temperatures. While it is of great physical interest, simulation of the …