The global security architecture and the Indian defence system have been revolutionised due to the advancement of technology, and because of this, the architecture is poised at the juncture of the second Quantum revolution, which is not only a drastic progress but also signifies how far we have come since the time of independence. While discussing the second Quantum revolution we cannot negate the fact that the first quantum revolution was quite significant in nature as it ruled throughout the 20th century and also managed to harness the statistical properties and elements of the quantum mechanics to develop foundational technologies such as the transistor, the laser, and the atomic clock, the contemporary era is defined by the transition to Quantum Revolution 2.0. This New Era is considered as one of the most progressive eras as it is distinguished by the capacity to control individual quantum systems, such as atoms, ions, photons, and electrons, in order to take use of the "strange" principles of quantum physics, such as tunneling, entanglement, and superposition, at the boundaries of known physical reality. This paper shall focus upon the analytical research of quantum technology and how it has shaped the defence sector globally. This paper also highlights the multiple utility of this technology and its incorporation in India. In the end it proposes a study of its good and bad sides by highlighting the recent setbacks posed by them. Keywords: Technology; Security; defence; quantum; atomic
The global security architecture and the Indian defence system have been revolutionised due to the advancement of technology, and because of this, the architecture is poised at the juncture of the second Quantum revolution, which is not only a drastic progress but also signifies how far we have come since the time of independence. While discussing the second Quantum revolution we cannot negate the fact that the first quantum revolution was quite significant in nature as it ruled throughout the 20th century and also managed to harness the statistical properties and elements of the quantum mechanics to develop foundational technologies such as the transistor, the laser, and the atomic clock, the contemporary era is defined by the transition to Quantum Revolution 2.0. This New Era is considered as one of the most progressive eras as it is distinguished by the capacity to control individual quantum systems, such as atoms, ions, photons, and electrons, in order to take use of the "strange" principles of quantum physics, such as tunneling, entanglement, and superposition, at the boundaries of known physical reality. This paper shall focus upon the analytical research of quantum technology and how it has shaped the defence sector globally. This paper also highlights the multiple utility of this technology and its incorporation in India. In the end it proposes a study of its good and bad sides by highlighting the recent setbacks posed by them. Keywords: Technology; Security; defence; quantum; atomic
Over the past century, quantum theory has taken flight from conceptual breakthroughs, such as wave–particle duality, quantisation of energy, and the uncertainty principle, to practical tools that are the backbone of modern electronics, lasers, semiconductors, and precision measurement systems. In the twenty-first century, this progress under the regime of the second quantum revolution has acquired the ability to directly control, manipulate, and engineer individual quantum systems.Quantum technologies found their pillars in quantum properties, such as superposition, entanglement, and coherence and have exceeded the boundaries of classical physics. The steady theoretical advances, combined with experimental progress, have brought quantum concepts closer to real-life use. Significant progress has made in filed of computation, communication, sensing, navigation, medicine, cyber security, and national defense undr the guidance of quantum technology.This book chapter presents a comprehensive and pedagogical overview of quantum technologies. It highlights quantum computing, quantum communication, and quantum sensing and metrology. The shift of quantum mechanics into practical applications is discussed. Current research trends are reviewed alongside the technological and engineering challenges. The critical issues, such as decoherence, scalability, error correction, standardisation, and workforce development, are discussed, which further highlights the need for global collaboration. Both National governments and the private sector are investing heavily in quantum research. This will act as a booster for quantum technologies to revolutionise information processing, secure communications, and precision measurements. Consequently and will significantly impact the scientific and technological landscape.
Over the past century, quantum theory has taken flight from conceptual breakthroughs, such as wave–particle duality, quantisation of energy, and the uncertainty principle, to practical tools that are the backbone of modern electronics, lasers, semiconductors, and precision measurement systems. In the twenty-first century, this progress under the regime of the second quantum revolution has acquired the ability to directly control, manipulate, and engineer individual quantum systems. Quantum technologies found their pillars in quantum properties, such as superposition, entanglement, and coherence and have exceeded the boundaries of classical physics. The steady theoretical advances, combined with experimental progress, have brought quantum concepts closer to real-life use. Significant progress has made in filed of computation, communication, sensing, navigation, medicine, cyber security, and national defense undr the guidance of quantum technology. This book chapter presents a comprehensive and pedagogical overview of quantum technologies. It highlights quantum computing, quantum communication, and quantum sensing and metrology. The shift of quantum mechanics into practical applications is discussed. Current research trends are reviewed alongside the technological and engineering challenges. The critical issues, such as decoherence, scalability, error correction, standardisation, and workforce development, are discussed, which further highlights the need for global collaboration. Both National governments and the private sector are investing heavily in quantum research. This will act as a booster for quantum technologies to revolutionise information processing, secure communications, and precision measurements. Consequently and will significantly impact the scientific and technological landscape.
The aim of this paper is to evaluate the role of Quantum Radar in strengthening India's air defence architecture by addressing the limitations of classical radar systems against stealth and low-observable aerial threats. Air defence in the 21st century is characterised by a continuous contest between detection and evasion. While modern radars have evolved through digital beamforming, phased arrays, and frequency agility, stealth technology—through shaping, radar-absorbent coatings, and signature management—has reduced aircraft radar cross-section to unprecedented levels. For India, facing a two-front threat from technologically advanced adversaries, reliable detection of stealth aircraft, cruise missiles, and UAVs is a strategic necessity. Quantum Radar, based on Quantum Illumination principles, utilises photon entanglement and correlation to detect low-RCS targets even in high-noise and jamming environments. This paper presents a comparative evaluation of Quantum Radar with India's indigenous radar systems and examines engineering implementation prospects under the National Quantum Mission. A phased roadmap is proposed to integrate photonic and quantum sensing technologies within the Integrated Air Defence System, enabling future-ready, quantum-resilient surveillance and target acquisition capabilities for the Indian Armed Forces.
We are currently in the midst of a second quantum revolution. The first quantum revolution gave us new rules that govern physical reality. The second quantum revolution will take these rules and use them to develop new technologies. In this review we discuss the principles upon which quantum technology is based and the tools required to develop it. We discuss a number of examples of research programs that could deliver quantum technologies in coming decades including: quantum information technology, quantum electromechanical systems, coherent quantum electronics, quantum optics and coherent matter technology.
Quantum technologies are rapidly moving from scientific research into the arenas of commercialisation and strategic competition, with significant implications for defence and security. While their full military impact may unfold over time, developments in quantum sensing, computing, and communications are already shaping national strategies, industrial ecosystems, and future capability planning. The growing competition among major technological powers highlights the need to act on both the opportunities and risks associated with quantum technologies. Quantum technologies have the potential to enhance military capabilities across domains, from resilient positioning, navigation, and timing to advanced sensing, computing, and secure communications. At the same time, they introduce new vulnerabilities, including risks to current cryptographic systems, supply chains, and technological dependencies. For NATO, the debate is therefore no longer whether quantum technologies matter, but how quickly the Alliance can adopt, operationalise, and secure them before strategic competitors gain asymmetric advantages. This article argues that NATO must pursue a two-track approach: first, fostering quantum innovation, experimentation, and operational adoption across the Alliance; and second, protecting its technological edge, supply chains, critical infrastructure, and security interests against emerging quantum-enabled threats. Achieving a quantum-ready Alliance will require close cooperation among Allies, industry, academia, and NATO entities to translate technological progress into secure and operationally relevant capabilities.
This review explores the Second Quantum Revolution, which builds on the foundations of the first to advance quantum science and technology significantly. We examine the diverse fields under this revolution, including quantum information technologies, quantum electromechanical systems, coherent quantum electronics, quantum optics, and coherent matter technologies. Assess the societal and ethical implications of the second quantum revolution and provide insights into its potential impact on various sectors, including healthcare, finance, communication, and technology, the knowledge dissemination and awareness of the second quantum revolution. The review emphasizes the transformative potential of these advancements for the economy, computing, and communication networks. Additionally, we address the critical challenges that must be overcome, such as the development of fault-tolerant quantum systems and the seamless integration of quantum and classical technologies. Ethical considerations related to privacy, security, and societal impacts are also discussed, highlighting the need for a thoughtful reevaluation of quantum technology's role in modern society. Ultimately, this review outlines the immense opportunities presented by the Second Quantum Revolution while providing insights into the multifaceted challenges it faces, setting the stage for future research and innovation in this groundbreaking field.