01349nas a2200133   4500000000100000008004100001260001200042100001600054700002200070245004900092856003900141490000600180520102900186       2022                            d  c07/20221 aAkash Kundu1 aJaroslaw Miszczak00aVariational certification of quantum devices  uhttps://arxiv.org/abs/2011.01879v20 v73 a<p>One of the requirements imposed on the realistic quantum computers is to provide computation results which can be repeated and reproduced. In the situation when one needs to repeat the quantum computation procedure several times, it is crucial that the copies of the quantum devices are similar in the sense of the produced results. In this work, we describe a simple procedure based on variational quantum eigensolver which can be utilized to compare quantum devices. The procedure is developed by combining Choi–Jamiołkowski isomorphism with the variational hybrid quantum–classical procedure for matrix diagonalization. We compare the introduced procedure with the scheme based on the standard bounds for the similarity between quantum operations by analysing its action on random quantum channels. We also discuss the sensitivity of the described procedure to the noise, and we provide numerical results demonstrating its feasibility in realistic scenarios by running the procedure on IBM quantum computer.</p>