🎛️ Multi-Qubit Gates
Master advanced quantum gates that operate on multiple qubits simultaneously
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CNOT Gate
What are Multi-Qubit Gates?
Multi-qubit gates operate on three or more qubits simultaneously, enabling complex quantum operations beyond simple two-qubit interactions. They are essential for universal quantum computation and advanced quantum algorithms.
🎯 Why Multi-Qubit Gates Matter
- •Universal Computation: Enable any quantum algorithm to be built
- •Classical Reversibility: Can simulate classical logic gates
- •Complex Entanglement: Create multi-particle entangled states
- •Error Correction: Foundation for quantum error correction codes
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3+ Qubit Operations
Gates that simultaneously control and modify three or more qubits
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Multiple Controls
Operations conditional on the state of two or more control qubits
🎛️
Complex Logic
Implement sophisticated quantum circuits and algorithms
♻️
Reversible
All operations can be undone, preserving quantum information
🌟 Evolution of Quantum Gates
1-Qubit
Single-Qubit Gates
Basic operations: X, Y, Z, H, Phase gates
2-Qubit
Two-Qubit Gates
CNOT, CZ, SWAP - creates entanglement
3-Qubit
Multi-Qubit Gates
Toffoli, Fredkin - universal for computation
N-Qubit
N-Control Gates
Multiple control qubits - error correction, algorithms
💡 Key Insight
The Toffoli gate alone is sufficient for universal classical computation when combined with simple gates. Add single-qubit gates, and you have universal quantum computation - the ability to build any quantum algorithm.