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What is Quantum Computing?

A curated, click-first guide to fundamentals and real-world applications.

2‑minute overview of where quantum helps.

What is Quantum Computing?

Quantum computing is a new and rapidly evolving computational paradigm rooted in the principles of quantum mechanics. It uses quantum bits (or qubits) that can in superpositions of 0 and 1 simultaneously. Combined with interference and entanglement, quantum programs can explore many possibilities in parallel and find solutions to certain complex problems much faster than classical computers. They're not faster computers; they just work differently.

Key Concepts

  1. Superposition — represent many states at once
  2. Entanglement — intrinsic relationship between two or more qubits
  3. Interference — amplifies right answers, cancels wrong ones
  4. Decoherence — quantum systems collapse due to environmental disturbance

Math Intuition

Real & Imaginary Numbers

Complex numbers, magnitude/phase, Euler's formula.

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Tensors

Vectors, matrices, tensor products (⊗), and dimensions.

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Trigonometry

Sine/cosine, phase shifts, and periodic signals.

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Applications