Variational Quantum Eigensolver for Classification in Credit Sales Risk

• URL: http://arxiv.org/abs/2303.02797v2
• Date: Tue, 9 Apr 2024 22:25:51 GMT
• Title: Variational Quantum Eigensolver for Classification in Credit Sales Risk
• Authors: Joanna Wiśniewska, Marek Sawerwain,
• Abstract summary: We take into consideration a quantum circuit which is based on the Variational Quantum Eigensolver (VQE) and so-called SWAP-Test. In the utilized data set, two classes may be observed -- cases with low and high credit risk. The solution is compact and requires only logarithmically increasing number of qubits.
• Score: 0.5524804393257919
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The data classification task is broadly utilized in numerous fields of science and it may be realized by different known approaches (e.g. neural networks). However, in this work, quantum computations were harnessed to solve the problem. We take into consideration a quantum circuit which is based on the Variational Quantum Eigensolver (VQE) and so-called SWAP-Test what allows us to solve a classification problem connected with credit sales. More specifically, we cope with a decision problem of determining customer's reliability based on values of selected decision variables (e.g. generated turnover, history of cooperation). The classical data samples are converted into normalized quantum states. After this operation, samples may be processed by a circuit of quantum gates. The VQE approach allows training the parameters of a quantum circuit (so-called ansatz) to output pattern-states for each class. In the utilized data set, two classes may be observed -- cases with low and high credit risk. However, the VQE circuit differentiates more classes than two (introduces more detailed cases) and the final results are obtained with the use of aforementioned SWAP-Test. The elaborated solution is compact and requires only logarithmically increasing number of qubits (due to the exponential capacity of quantum registers). Because of the low complexity of the presented quantum circuit, it is possible to perform experiments on currently available quantum computers, including the Noisy Intermediate-Scale Quantum (NISQ) devices. This type of devices, despite the presence of noise, is capable of solving the task analyzed in this work. All calculations, simulations, plots, and comparisons were implemented and conduced in the Python language environment. Source codes for each example of quantum classification can be found in the source code repository.

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