Potential and limitations of quantum extreme learning machines
- URL: http://arxiv.org/abs/2210.00780v4
- Date: Fri, 16 Jun 2023 15:00:09 GMT
- Title: Potential and limitations of quantum extreme learning machines
- Authors: Luca Innocenti, Salvatore Lorenzo, Ivan Palmisano, Alessandro Ferraro,
Mauro Paternostro, G. Massimo Palma
- Abstract summary: We present a framework to model QRCs and QELMs, showing that they can be concisely described via single effective measurements.
Our analysis paves the way to a more thorough understanding of the capabilities and limitations of both QELMs and QRCs.
- Score: 55.41644538483948
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum reservoir computers (QRC) and quantum extreme learning machines
(QELM) aim to efficiently post-process the outcome of fixed -- generally
uncalibrated -- quantum devices to solve tasks such as the estimation of the
properties of quantum states. The characterisation of their potential and
limitations, which is currently lacking, will enable the full deployment of
such approaches to problems of system identification, device performance
optimization, and state or process reconstruction. We present a framework to
model QRCs and QELMs, showing that they can be concisely described via single
effective measurements, and provide an explicit characterisation of the
information exactly retrievable with such protocols. We furthermore find a
close analogy between the training process of QELMs and that of reconstructing
the effective measurement characterising the given device. Our analysis paves
the way to a more thorough understanding of the capabilities and limitations of
both QELMs and QRCs, and has the potential to become a powerful measurement
paradigm for quantum state estimation that is more resilient to noise and
imperfections.
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