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- W4366457852 abstract "The quantum Boltzmann machine (QBM) is a generative machine learning model for both classical data and quantum states. The training of the QBM consists of minimizing the relative entropy from the model to the target state. This requires QBM expectation values which are computationally intractable for large models in general. It is therefore important to develop heuristic training methods that work well in practice. In this work, we study a heuristic method characterized by a nested loop: the inner loop trains the $beta$-variational quantum eigensolver ($beta$-VQE) by Liu et al. (2021) to approximate the QBM expectation values; the outer loop trains the QBM to minimize the relative entropy to the target. We show that low-rank representations obtained by $beta$-VQE provide an efficient way to learn low-rank target states, such as classical data and low-temperature quantum tomography. We test the method on both classical and quantum target data with numerical simulations of up to 10 qubits. For the cases considered here, the obtained QBMs can model the target to high fidelity. The approach offers a valuable route towards variationally training QBMs on near-term quantum devices." @default.
- W4366457852 created "2023-04-22" @default.
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- W4366457852 date "2023-04-17" @default.
- W4366457852 modified "2023-10-18" @default.
- W4366457852 title "Training Quantum Boltzmann Machines with the $beta$-Variational Quantum Eigensolver" @default.
- W4366457852 doi "https://doi.org/10.48550/arxiv.2304.08631" @default.
- W4366457852 hasPublicationYear "2023" @default.
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