About the Book
About the Book
Quantum Computing Disentangled breaks down one of the most complex frontiers of science into clear, accessible ideas. Quantum computing is hailed as the next great leap after classical computers-promising breakthroughs in medicine, finance, climate, and cybersecurity. Yet for many, it remains a subject shrouded in math and mystery.
This book bridges that gap. Instead of starting with wavefunctions or dense equations, it uses analogies, storytelling, and step-by-step concepts to explain what makes quantum computers different, how they work, and why they matter. Readers will journey from the history of computing to the leap from bits to qubits, through quantum gates, algorithms, simulation, communication, and real-world applications.
The book also explores hardware modalities-trapped ions, superconductors, photons, and more-comparing their physics and performance to help readers critically engage with the technology and its fast-growing ecosystem.
Whether you are a student, policymaker, professional, or simply curious, Quantum Computing Disentangled offers an approachable guide to a field that will shape the future. Chapters
Qubits Demystified: The Quantum Heart of Computation
Bits vs Qubits, Wave Function, Schrödinger Equation, Bra-Ket, Bloch Sphere, Superposition, Entanglement, Bell States, Bell Theorem, Inequality, Locality, EPR Paradox, Decoherence, Physical/Logical/Algorithmic Qubits
Hardware of the Quantum World
Modalities, Technologies, Terms, Comparisons & Players for Superconducting, Trapped Ion, Photonic, Silicon Spin, Diamond NV, Neutral Atom, Topological, Annealing
Information in the Quantum World
Superposition, Entanglement, Measurement, State Collapse, No Cloning Theorem, Teleportation, Fragility, Factors for Decoherence, Quantum Error Correction
Building Quantum Logic: Gates and Circuits
State Vectors, Hilbert Space, Probability Amplitudes, Phase, Matrix Unitarity and Reversibility, Pauli Gates (X, Y, Z), Hadamard (H), Self-Inverse, Rotation, Phase (Z, S, T), Clifford Gates, Two-Qubit Gates (CNOT, CZ, SWAP, iSWAP), Three-Qubit Gates (Fredkin, Toffoli), Gate Selection and Sequencing, Circuit Examples (GHZ, Bell States), Measurement
Quantum Algorithms
Search, Oracle Function, Diffusion, Amplitude Amplification, Interference, Quantum Fourier Transform, Grover's Algorithm, Shor's Algorithm, Example Problems
Teleportation: How It Works
Step-by-step explanation with example
Quantum Stack - Coding in the Quantum Era
Qiskit, Cirq, Q#, Braket SDK, pyQuil, Forest SDK, PennyLane, Ocean SDK, Case Study, QUBO, QAOA, OpenFermion, Selecting Quantum Stack
Quantum Communication - Enabling the Future of Secure Connectivity
QKD, BB84 Protocol, E91 Protocol, Teleportation, Entanglement Swapping, Components of a Quantum Communication System, Quantum Networks, Quantum Internet, Distributed Quantum Computing, Post-Quantum Cryptography
Quantum Impact - Real World Applications & the Long View
Chemistry & Materials, Life Sciences, Quantum Sensing in Health, Food, Agriculture, Climate, Energy, Finance, Logistics, Infrastructure, Global Initiatives, Roadmaps
Quantum Simulation - Simulating Nature
Analog & Digital Simulation, Simulators, Applications, Digital Twins, Predictive Intelligence
Quantum AI - Learning in Superposition
Quantum Machine Learning, Variational Quantum Circuits, QML Algorithms & Models, Use Cases, AI Behind Digital Twins
About the Author Niraj Gupta is a physicist and strategist with 40+ years in quantum science, semiconductors, telecom, and policy. With dual physics master's from IIT Delhi and an MBA, he's led at STMicroelectronics, Ericsson, Alcatel, and AT&T. A bestselling author and speaker, he now champions quantum education.
