Quantum Machine Learning (QML) is an emerging interdisciplinary field which combines Quantum Computing and Machine Learning. With the help of Quantum principles, QML outperforms classical machine learning (CML) models. These principles make the QML models work exponentially faster than the CML models. A detailed analysis of various QML models, algorithms, and architectures with respect to healthcare applications is presented in this paper. The currently available quantum systems are associated with noise, which is why they are referred to as Noisy Intermediate-Scale Quantum Systems. The internal noise of a quantum system presents various challenges when experiments are implemented and run on Quantum systems and simulators. The current challenges in developing QML for healthcare applications, such as internal noise, hardware limitations, and high computational cost, are also detailed in this paper. The detailed analysis presented in this paper will help researchers to know the opportunities and future directions in this field.
Quantum Machine Learning (QML) is an emerging interdisciplinary field which combines Quantum Computing and Machine Learning. With the help of Quantum principles, QML outperforms classical machine learning (CML) models. These principles make the QML models work exponentially faster than the CML models. A detailed analysis of various QML models, algorithms, and architectures with respect to healthcare applications is presented in this paper. The currently available quantum systems are associated with noise, which is why they are referred to as Noisy Intermediate-Scale Quantum Systems. The internal noise of a quantum system presents various challenges when experiments are implemented and run on Quantum systems and simulators. The current challenges in developing QML for healthcare applications, such as internal noise, hardware limitations, and high computational cost, are also detailed in this paper. The detailed analysis presented in this paper will help researchers to know the opportunities and future directions in this field.
This study presents a comprehensive survey on Quantum Machine Learning (QML) along with its current status, challenges, and perspectives. QML combines quantum computing and machine learning to solve complex problems in different domains, leveraging quantum algorithms to enhance classical machine learning techniques. We explore the application of QML in various domains such as cybersecurity, finance, healthcare, and drug discovery. The survey includes detailed tabular comparisons of the different QML models used for each application area, highlighting key techniques, findings, and their limitations. In this work, we identify important trends such as the strong potential of hybrid quantum-classical models for near-term applications and the significant challenges in the quantum domain due to quantum noise, limited qubit scalability, and costly qRAM implementations. Furthermore, we discuss solutions that emphasize advances in hardware, quantum error correction, and algorithmic innovations to address these challenges. By providing an in-depth analysis of QML’s potential across different fields, this study provides valuable insights into how QML can address complex real-world challenges and transform traditional machine learning practices.
Quantum machine learning (QML) is an emerging field combining quantum computing and artificial intelligence, with promising applications in medicine and healthcare. This survey reviews more than 60 studies published between 2018 and 2025, highlighting a sharp increase in research activity, especially in the last three years. We address seven core research questions related to publication trends, the use of real quantum hardware versus simulators, quantum architectures overview, dataset types, medical domains, algorithmic frameworks, and reported results. Our analysis shows that most QML research in healthcare is conducted on simulators due to limited hardware access, and it relies on small datasets. Quantum convolutional neural network (QCNN) architectures dominate image-based medical tasks such as tumor detection, pneumonia diagnosis, and ECG interpretation, while feature-based datasets are mainly analyzed with variational quantum classifiers and quantum support vector machines. Despite hardware constraints, QML models often match or surpass classical machine learning approaches in accuracy, frequently reaching 95–99%. However, these performance statements should be qualified to recognize experimental limitations and avoid excessive optimism and should not be interpreted as definitive proof of quantum superiority at this stage. Additionally, issues with reproducibility and reporting of hardware details persist, which is a significant research gap. This review emphasizes the need for standardized benchmarks, more real hardware testing, and architecture-aware algorithm design. With the potential for accelerated diagnostics and personalized healthcare, QML represents a strategic direction for future medical research.
Quantum Machine Learning (QML) is an emerging interdisciplinary field that combines the principles of quantum computing and artificial intelligence (AI) to overcome the limitations of classical machine learning algorithms.This paper explores the foundational principles of quantum computing and their application in enhancing machine learning algorithms.The researcher discuss the potential of quantum speedup, new possibilities in data classification and optimization, and hardware and algorithm development challenges.The paper also highlights the interdisciplinary applications of QML in financial modeling, logistics, supply chain optimization, and drug discovery.Through qualitative and quantitative analysis, we provide insights into the current state of QML, limitations, and future research directions.Quantum computing, with its ability to process information in fundamentally new ways, offers a paradigm shift in computational power.By leveraging quantum mechanical phenomena such as superposition, entanglement, and interference, QML aims to solve problems that are currently intractable for classical computers.This paper delves into the theoretical underpinnings of QML, examining how quantum algorithms can be integrated with classical machine learning techniques to achieve superior performance.The researcher also explore the practical implications of QML in various industries, emphasizing its potential to revolutionize fields such as finance, logistics, and healthcare.Despite the promising advancements, significant challenges remain, including the development of robust quantum hardware and the creation of scalable quantum algorithms.This paper provides a comprehensive overview of the current state of QML, identifies key research gaps, and outlines future directions for this rapidly evolving field.
Machine Learning (ML) has been extensively utilized in various scientific and engineering domains. But the inherent constraints and computational complexity that arise in classical machine learning are particularly evident when dealing with large-scale, high-dimensional datasets or when attempting to solve intricate optimisation problems. Quantum systems exhibit unconventional patterns that are typically not effectively generated by traditional systems and can also tackle high dimensional and large size datasets efficiently. Therefore, it is believed that quantum computing systems may outperform traditional computing devices in machine learning tasks. Quantum Machine Learning (QML) has emerged as a rapidly developing field that combines the concepts of quantum mechanics and machine learning to solve complex problems across various disciplines. The domain of quantum machine learning investigates the development and execution of quantum software with the potential to facilitate machine learning at a much superior pace compared to traditional computers. However, the major challenges encountered are hardware limitations, noise, and development of quantum algorithms. The objective of this paper is to provide an insight on the foundational principles, essential algorithms, various associated platforms, potential applications and challenges being faced by QML. As data continues to grow in size and complexity, together with the emergence of nonlinear and high-dimensional real-world situations, the computing benefits offered by QML have the potential to facilitate significant advancements in the fields of healthcare, finance, robotics, logistics, communication, and cyber security. This paper presents the basis for future research work related to development of quantum algorithms in the domain of machine learning.
Quantum Machine Learning represents a paradigm shift at the intersection of Quantum Computing and Machine Learning, leveraging quantum phenomena such as superposition, entanglement, and quantum parallelism to address the limitations of classical approaches in processing high-dimensional and large-scale datasets. This survey provides a comprehensive analysis of Quantum Machine Learning, detailing foundational concepts, algorithmic advancements, and their applications across domains such as healthcare, finance, and quantum chemistry. Key techniques, including Quantum Support Vector Machine, Quantum Neural Network, Quantum Decision Trees, and hybrid quantum-classical models, are explored with a focus on their theoretical foundations, computational benefits, and comparative performance against classical counterparts. While the potential for exponential speedups and enhanced efficiency is evident, the field faces significant challenges, including hardware constraints, noise, and limited qubit coherence in the current era of Noisy Intermediate-Scale Quantum devices. Emerging solutions, such as error mitigation techniques, hybrid frameworks, and advancements in quantum hardware, are discussed as critical enablers for scalable and fault-tolerant Quantum Machine Learning systems. By synthesizing state-of-the-art developments and identifying research gaps, this survey aims to provide a foundational resource for advancing Quantum Machine Learning toward practical, real-world applications in tackling computationally intensive problems.
Quantum Computing (QC) claims to improve the efficiency of solving complex problems, compared to classical computing. When QC is integrated with Machine Learning (ML), it creates a Quantum Machine Learning (QML) system. This paper aims to provide a thorough understanding of the foundational concepts of QC and its notable advantages over classical computing. Following this, we delve into the key aspects of QML in a detailed and comprehensive manner. In this survey, we investigate a variety of QML algorithms, discussing their applicability across different domains. We examine quantum datasets, highlighting their unique characteristics and advantages. The survey also covers the current state of hardware technologies, providing insights into the latest advancements and their implications for QML. Additionally, we review the software tools and simulators available for QML development, discussing their features and usability. Furthermore, we explore practical applications of QML, illustrating how it can be leveraged to solve real-world problems more efficiently than classical ML methods. This survey aims to consolidate the current landscape of QML and outline key opportunities and challenges for future research.