  We introduce an error mitigation framework that mitigates errors in a quantum
circuit using circuit cutting. Our framework can be implemented in polynomial
time for a wide variety of quantum circuits. Our technique involves cutting the
circuit in such a way that we run the circuit that needs to be executed on the
quantum hardware whereas the error mitigation circuit is run on a simulator. We
perform error mitigation qubit by qubit and then provide a way to combine the
different probabilities from each of the individual qubit error mitigation runs
such that the full circuit is error mitigated. We apply our framework to the
VQE hardware-efficient ansatz acheiving estimated ground state energies very
close to the noise-free simulation results.
