Towards enhancing quantum expectation estimation of matrices through partial Pauli decomposition techniques and post-processing

Dingjie Lu, Yangfan Li, Dax Enshan Koh +3

We introduce an approach for estimating the expectation values of arbitrary $n$-qubit matrices $M\in {\mathbb{C}}^{2^n\times 2^n}$ on a quantum computer. In contrast to conventional…