Quantum machine learning (Quantum ML) is a field of study that combines quantum computing principles with machine learning techniques. It aims to improve the performance of machine learning algorithms by utilizing the unique properties of quantum systems, such as superposition and entanglement. Two examples of quantum machine learning are using quantum computers to perform optimization tasks difficult for classical computers or using quantum algorithms to analyze large data sets more efficiently. However, it is still an active research area, with many proposed approaches still in the theoretical stage.
Quantum data is any data source that occurs in a natural or artificial quantum system. This could be data generated by a quantum computer, such as the samples gathered from the Sycamore processor for Google's demonstration of quantum supremacy. Quantum data exhibit superposition and entanglement, resulting in joint probability distributions that could require an exponential amount of classical computational resources to represent or store. The quantum supremacy experiment demonstrated that it is possible to sample from a highly complex joint probability distribution of 253 Hilbert space.
NISQ processors generate noisy quantum data that is typically entangled just before the measurement. Models can be created using heuristic machine learning techniques that maximize the extraction of useful classical information from noisy entangled data. The TensorFlow Quantum (TFQ) library provides primitives for developing models that disentangle and generalize correlations in quantum data, allowing for improving existing quantum algorithms and discovering new quantum algorithms.
Quantum machine learning (QML) combines the power of quantum computing with machine learning techniques to solve problems that would be infeasible or impractical to solve using traditional methods. Some of the potential advantages of QML include:
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Classical machine learning algorithms are based on mathematical optimization and probability theory and are used to train models that can make predictions or decisions based on input data. Examples include decision trees, support vector machines, and neural networks. These algorithms work by searching for patterns in the data and using these patterns to make predictions.
Quantum machine learning algorithms, on the other hand, are based on quantum mechanics and are used to train models that can make predictions or decisions based on quantum states. These algorithms take advantage of the unique properties of quantum mechanics, such as superposition and entanglement, to perform impossible calculations with classical algorithms. Examples of quantum machine learning algorithms include quantum neural networks, quantum support vector machines, and quantum principal component analysis.
Overall, the main difference between classical and quantum machine learning algorithms is the underlying mathematical framework they are based on and the types of calculations they can perform. While classical algorithms are based on classical physics and are limited by the computational resources available, quantum algorithms are based on quantum physics and can potentially perform certain calculations exponentially faster than classical algorithms.
Quantum machine learning (QML) is a relatively new field that combines the power of quantum computing with machine learning capabilities. However, several obstacles and limitations are currently impeding the development and practical application of QML.
There currently needs to be more quantum software and libraries for QML; implementing QML algorithms is difficult for researchers and practitioners.
QML is still in its early stages, and there currently needs to be more standardization in terms of the algorithms and techniques used. This makes comparing and evaluating different QML approaches difficult.
Despite these obstacles and limitations, the field of QML remains an active area of research, with numerous ongoing efforts to overcome them. QML is likely to become a more practical and powerful tool for solving complex problems in the future as larger-scale quantum computers are developed and our understanding of quantum algorithms grows.
Various industries, including finance, healthcare, and energy, can benefit from quantum computing. Some specific use cases of quantum computing in the enterprise include
The availability of data profoundly changes the question when assessing the capabilities of quantum computers to aid in machine learning. In our work, we create a practical set of tools for investigating these concerns, which we then use to create a new projected quantum kernel method that has several advantages over prior approaches. We progress towards the largest numerical demonstration of potential learning advantages for quantum embeddings to date, 30 qubits. While a comprehensive computational advantage in a real-world application needs to be observed, this research lays the groundwork for the future. We invite any interested readers to read the paper as well as the accompanying TensorFlow-Quantum tutorials, which make it simple to build on this work.
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