Measuring the entanglement of coupled spins by multiphoton interference
Mesoscale and Nanoscale Physics
2007-05-23 v2
Abstract
We propose an experimental method to measure the entanglement of coupled spins, each in a separate quantum dot, by means of multiphoton interference patterns generated through the scattering of two laser beams off the quantum dots. We calculate the N-photon quantum correlations measured by N detectors on an image plane. Using two perpendicular laser beams, either many correlation measurements on a time ensemble or a single correlation measurement on a spatial ensemble of the many-qubit state is sufficient to retrieve all the possible amplitudes of a many-qubit state.
Keywords
Cite
@article{arxiv.cond-mat/0307657,
title = {Measuring the entanglement of coupled spins by multiphoton interference},
author = {Michael N. Leuenberger and Michael E. Flatte and D. D. Awschalom},
journal= {arXiv preprint arXiv:cond-mat/0307657},
year = {2007}
}
Comments
4 pages, 3 EPS figures, REVTeX