Hyperentanglement-enabled Direct Characterization of Quantum Dynamics
Abstract
We use hyperentangled photons to experimentally implement an entanglement-assisted quantum process tomography technique known as Direct Characterization of Quantum Dynamics. Specifically, hyperentanglement-assisted Bell-state analysis enabled us to characterize a variety of single-qubit quantum processes using far fewer experimental configurations than are required by Standard Quantum Process Tomography (SQPT). Furthermore, we demonstrate how known errors in Bell-state measurement may be compensated for in the data analysis. Using these techniques, we have obtained single-qubit process fidelities as high as 98.2% but with one-third the number experimental configurations required for SQPT. Extensions of these techniques to multi-qubit quantum processes are discussed.
Cite
@article{arxiv.1205.2587,
title = {Hyperentanglement-enabled Direct Characterization of Quantum Dynamics},
author = {Trent M. Graham and Julio T. Barreiro and Masoud Mohseni and Paul G. Kwiat},
journal= {arXiv preprint arXiv:1205.2587},
year = {2014}
}
Comments
This is part of a joint submission with an implementation with Ions: "Experimental characterization of quantum dynamics through many-body interactions" by Daniel Nigg, Julio T. Barreiro, Philipp Schindler, Masoud Mohseni, Thomas Monz, Michael Chwalla, Markus Hennrich and Rainer Blatt