Quantum process tomography of a single solid state qubit

Howard, M.; Twamley, J.; Wittmann, C.; Gaebel, T.; Jelezko, F.; Wrachtrup, J.

Quantum process tomography of a single solid state qubit

Authors

Description

We present an example of quantum process tomography performed on a single solid state qubit. The qubit used is two energy levels of the triplet state in the Nitrogen-Vacancy defect in Diamond. Quantum process tomography is applied to a qubit which has been allowed to decohere for three different time periods. In each case the process is found in terms of the $χ$ matrix representation and the affine map representation. The discrepancy between experimentally estimated process and the closest physically valid process is noted.
4 pages, 8 figures