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Quantum logic gates

(also quantum gate)

Quantum logic gates definition

Quantum logic gates are tools that perform powerful calculations, allowing researchers to manipulate the state of cubits (bits of information). Each quantum gate has a specific function — like changing the state of the qubit or entangling multiple qubits together. Quantum logic gates help solve problems efficiently and play a key role in quantum computing.

See also: post-quantum cryptography

Quantum logic gate functions

  • State manipulation: Quantum gates can change the state (or the properties and configurations) of a qubit.
  • Entanglement: Quantum gates can entangle qubits. Entanglement is when the states of several qubits become interconnected — even when they are physically apart. When you apply an operation on one qubit, you affect the state of the other qubit.
  • Quantum Fourier Transform (QFT): QFT transforms the quantum state of multiple qubits in a way that represents frequency information. It's like a special mathematical operation that helps analyze patterns and frequencies within quantum algorithms.

Why are quantum logic gates important?

  • Quantum logic gates are the key to performing complex calculations in quantum computing. They provide the means to perform operations on qubits and allow us to solve specific problems using quantum computers.
  • Quantum logic gates are used in quantum error correction techniques, which are crucial for protecting quantum information from errors caused by noise and disturbances.