# Characterize hardware

Accurately characterize Hamiltonian parameters, identify noise sources, or probe unknown quantum systems

### How to perform noise spectroscopy on arbitrary noise channels

Reconstructing noise spectra using shaped control pulses

### How to perform parameter estimation with a small amount of data

Estimate Hamiltonian model parameters using measured data and the graph-based optimization engine

### How to perform parameter estimation with a large amount of data

Estimate Hamiltonian model parameters using measured data and the graph-based stochastic optimization engine

### How to characterize a transmission line using a qubit as a probe

Characterize transmission-line bandwidth via probe measurements and the graph-based optimization engine