  Some of the most problematic issues that limit the implementation of
applications on Noisy Intermediate Scale Quantum (NISQ) machines are the
adverse impacts of both incoherent and coherent errors. We conducted an
in-depth study of coherent errors on a quantum hardware platform using a
transverse field Ising model Hamiltonian as a sample user application. We
report here on the results from these computations using several error
mitigation protocols that profile these errors and provide an indication of the
hardware qubit stability. Through a detailed set of measurements we identify
inter-day and intra-day qubit calibration drift and the impacts of quantum
circuit placement on groups of qubits in different physical locations on the
processor. This paper also discusses how these measurements can provide a
better understanding of these types of errors and how they may improve efforts
to validate the accuracy of quantum computations.
