This book examines the role of translational symmetry in shaping and stabilising quantum entanglement across spatial and temporal domains. Building on foundational concepts from the EPR paradox and Bell’s theorem, it introduces a nodal–antinodal framework to explain coherence preservation and entanglement amplification. The text integrates analytical models, numerical simulations, and applications in photonic crystals, nanocavities, and time crystals, demonstrating how symmetry-based approaches enhance noise resistance, quantum communication, and light–matter interaction control, while extending these principles to quantum-inspired computational and data analysis frameworks.

Features:

- Explains the theoretical foundations linking translational symmetry with the dynamics and stability of quantum entanglement.

- Presents a nodal–antinodal framework describing mechanisms for coherence preservation and entanglement amplification.

- Examines temporal symmetry and its role in time crystals for sustaining entangled quantum states.

- Demonstrates symmetry-based strategies for noise-resistant entanglement filtering in quantum communication systems.

- Analyses applications in photonic crystal fibers, moiré systems, and nanocavities for controlled light–matter interactions.

This book is for researchers, graduate students, and professionals in quantum physics, photonics, nanotechnology, computational science, and interdisciplinary fields involving quantum technologies and data-driven systems.

Kisalaya Chakrabarti has 25 years of teaching and research experience in the field of electronics and communication engineering. His research domain covers different areas of optical communications. He earned a PhD from the University of Tsukuba, Japan and two postdoctoral certificates from Utsunomiya University and National Institute for Material Science also from Japan. He has administrative experiences as chair professor in the department of Electronics and Communication Engineering at Bengal Institute of Technology and Management (Santiniketan), where he has also worked as Dean (R&D) for few months. He rendered his duties as principal at Secom Engineering College situated at Sankrail, Howrah and Pailan College of Management and Technology (PCMT), Kolkata for about two years. The title of his PhD thesis is “An Investigation of Photonic Crystals and Time-Reversed Scattering using Nonstandard FDTD”. Presently he is a professor in the Department of Electronics and Communication Engineering at Haldia Institute of Technology, ICARE Complex, HIT Campus, Haldia, Purba Medinipur, India.

He is a senior member of IEEE and he has been a Life Fellow of the Optical Society of India since 2005. He was the recipient of the prestigious MONBUKAGAKUSHO (MEXT) Scholarship for his doctoral program at the University of Tsukuba from the Japanese Government.