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arXiv · 2302.04101

Generation of Pseudo-Random Quantum States on Actual Quantum Processors

Gabriele Cenedese·Maria Bondani·Dario Rosa·Giuliano Benenti
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Abstract

The generation of a large amount of entanglement is a necessary condition for a quantum computer to achieve quantum advantage. In this paper, we propose a method to efficiently generate pseudo-random quantum states, for which the degree of multipartite entanglement is nearly maximal. We argue that the method is optimal, and use it to benchmark actual superconducting (IBM's ibm_lagos) and ion trap (IonQ's Harmony) quantum processors. Despite the fact that ibm_lagos has lower single-qubit and two-qubit error rates, the overall performance of Harmony is better thanks to low error rate in state preparation and measurement and to the all-to-all connectivity of qubits. Our result highlights the relevance of the qubits network architecture to generate highly entangled state.

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Gabriele Cenedese, Maria Bondani, Dario Rosa, Giuliano Benenti. 2023-02-08. Generation of Pseudo-Random Quantum States on Actual Quantum Processors. https://doi.org/10.3390/e25040607

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