Reliability analysis of algorithms on a desk Quantum Computer

Quantum computing, a data processing technology based on quantum mechanics, is one of the most promising technologies in the current research scenario. Indeed, this new paradigm disrupts how information is conceived, stored, and processed thus making quantum computers still complicated to manage and program. Added to this complexity is the need to guarantee quantum coherence, which could fail due to either noise or the influence of external parameters. While high-power quantum computers are usually conditioned and protected by complex and expensive systems supplied by the manufacturer itself, relatively low-cost desk quantum computers are only accompanied by data sheets reporting operation limits within influence parameters should be constrained but no analytical information is provided about computer sensitivity to the parameters. In this paper, the authors report the experimental results of a desk two-qubit quantum computer performance characterization carried out by evaluating its sensitivity to influence parameters during the execution of elementary algorithms. The aim is to help face the use of this frontier computing resource also in research projects where funds cannot cover the cost of complex conditioning systems. After a brief introduction on quantum computing and circuits, the adopted test method is described, and the experimental results discussed in detail.