PAMS Seminar: "Accelerated Variational Quantum Eigensolver with Joint Bell Measurement" by Chenfeng Cao

Chenfeng Cao
Hong Kong University of Science &Technology
Center for Quantum Technologies

Abstract:

In this talk, I will introduce a protocol termed joint Bell measurement VQE to reduce the number of measurements and speed up the VQE optimization.  VQE stands as a prominent quantum-classical hybrid algorithm for near-term quantum computers to obtain the ground states of molecular Hamiltonians in quantum chemistry. However, due to the non-commutativity of the Pauli operators in the Hamiltonian, the number of measurements required on quantum computers increases significantly as the system size grows, which may hinder practical applications of VQE. Our method employs joint Bell measurements, enabling the simultaneous measurement of the absolute values of all expectation values of Pauli operators present in the Hamiltonian. Our approach can also be utilized in various quantum algorithms whose cost functions are the expectation values of many Pauli operators.

This is a Zoom seminar: https://missouristate.zoom.us/j/91457682142.

Free