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복잡계 이론물리 연구단
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Generation of Pseudo-Random Quantum States on Actual Quantum Processors

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Title
Generation of Pseudo-Random Quantum States on Actual Quantum Processors
Author(s)
Cenedese, Gabriele; Bondani, Maria; Dario Rosa; Benenti, Giuliano
Publication Date
2023-04
Journal
Entropy, v.25, no.4
Publisher
MDPI
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 its 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 states. © 2023 by the authors.
URI
https://pr.ibs.re.kr/handle/8788114/13460
DOI
10.3390/e25040607
ISSN
1099-4300
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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