Error characterization in quantum information processing: A protocol for analyzing spatial correlations and its experimental implementation
Cecilia C. López, Benjamin Lévi, David G. Cory · Physical Review A · 2009
We present a protocol for error characterization and its experimental implementation with four qubits in liquid state NMR. The method is designed to retrieve information about spatial correlations and scales as $O({n}^{w})$, where $w$ is the maximum number of qubits that have non-negligible interaction. We discuss the practical aspects regarding accuracy and implementation.