Experimental Approach of the Quantum Volume on Different Quantum Computing Devices

Abstract

Quantum Computing is one of the most promising technology advancements of our time, promising to clarify problems considered unsolved for a classical computer. Real Quantum Computer Devices—once a science fiction concept—are now a reality. Many challenges still remain, on the way to achieve the so-called quantum supremacy. A phenomenon called Quantum Decoherence is the main cause of noise, making the available Quantum Computer Devices now limited to a few dozens of qubits at present. Despite that, most of the IT giants as IBM, Google and Rigetti are investing large amounts of money on deferent technological approaches to implement such devices and giving free access through the cloud not only to researchers but to common users also. So, it is important to evaluate and compare Quantum Computers of different philosophy, a process far more difficult than the equivalent for a classical computer. Quantum Volume represents a metric which measures the Quantum Computing Devices’ reliability in terms of error rates. In this paper, quantum circuits implementing Hadamard and CNOT gates were examined on three dif-ferent IBM Quantum Computer Devices in order to experimentally investigate Quantum Volume and attempt to provide a meaning of this metric. Data of these experiments are presented and additionally, different metrics are used to compare the performance of the Quantum Computer Devices. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.