  We use quantum computers to test the foundations of quantum mechanics through
quantum algorithms that implement some of the experimental tests as the basis
of the theory's postulates. These algorithms can be used as a test of the
physical theory under the premise of a perfect hardware or as a test of the
hardware under the premise that quantum theory is correct. In this paper, we
show how the algorithms can be used to test the efficacy of a quantum computer
in obeying the postulates of quantum mechanics. We study the effect of
different types of errors on the results of experimental tests of the
postulates. A salient feature of this error analysis is that it is deeply
rooted in the fundamentals of quantum mechanics as it highlights how systematic
errors affect the quantumness of the quantum computer.
