Quantum Information Journal Club: ‘Efficient Characterisation of Quantum Information Processors’

Speaker: Pablo Viñas Martínez (IFT)

Títle: ‘Efficient Characterisation of Quantum Information Processors’

Venue&Time: Gray Room 1 / 11:30

Abstract: “The precise characterisation and benchmarking of quantum information processors (QIPs) is essential for the development of quantum technologies. From the engineering of low-error physical components to the design of physically informed decoding strategies in quantum error correction (QEC), a detailed understanding of noise plays a central role. However, achieving an appropriate balance between the amount of information extracted and the experimental overhead required by characterisation protocols remains a significant challenge. In this talk, I will explore several approaches aimed at addressing this trade-off. First, I will discuss how the incorporation of physically motivated models can substantially reduce the resource requirements of quantum tomography protocols (https://arxiv.org/abs/2407.11539, https://arxiv.org/abs/2507.02542). Second, I will consider the problem from a complementary perspective: rather than focusing on the characterisation of fully general QIPs, I will examine protocols tailored to the characterisation of QEC circuits.”