Precisely knowing an interaction Hamiltonian is crucial to realize quantum information tasks, especially to experimentally demonstrate a quantum computer and a quantum memory. We propose a scheme to experimentally evaluate the spin-spin interaction for a two-qubit system by the weak measurement technique initiated by Yakir Aharonov and his colleagues. Furthermore, we numerically confirm our proposed scheme in a specific system of a nitrogen vacancy center in diamond. This means that the weak measurement can also be taken as a concrete example of the quantum process tomography.
@article{arxiv.1007.5370,
title = {Estimation of Spin-Spin Interaction by Weak Measurement Scheme},
author = {Yutaka Shikano and Shu Tanaka},
journal= {arXiv preprint arXiv:1007.5370},
year = {2011}
}
Comments
4 pages, 1 table, 2 figures, to appear in Europhysics Letters