양자 게이트 (Quantum Gate)
양자 컴퓨팅의 논리 회로 단위.
A Quantum Gate is the equivalent of a classical logic gate (like AND, OR, NOT) but adapted for the principles of quantum mechanics. Unlike classical gates, which are often dissipative and irreversible, all quantum gates (except for measurement) are Unitary and Reversible. They operate on superpositions of states, allowing for the parallel transformation of quantum information. Mathematically, a gate is a unitary operator $U$ that acts on a state vector $|\psi angle$, such that the total probability is conserved ($U^{\dagger}U = I$).
graph LR
Center["양자 게이트 (Quantum Gate)"]:::main
Pre_linear_algebra["linear-algebra"]:::pre --> Center
click Pre_linear_algebra "/terms/linear-algebra"
Pre_qubit["qubit"]:::pre --> Center
click Pre_qubit "/terms/qubit"
Rel_decoherence["decoherence"]:::related -.-> Center
click Rel_decoherence "/terms/decoherence"
Rel_bit["bit"]:::related -.-> Center
click Rel_bit "/terms/bit"
Rel_linear_optical_quantum_computer["linear-optical-quantum-computer"]:::related -.-> Center
click Rel_linear_optical_quantum_computer "/terms/linear-optical-quantum-computer"
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🧒 5살도 이해할 수 있게 설명
일반 컴퓨터의 게이트가 전기를 켜고 끄는(0 또는 1) 스위치라면, 양자 게이트는 큐비트를 뒤집거나 두 가지 상태를 동시에 갖게 만드는 '마법의 거울' 같아요. 양자 계산을 하기 위해 사용하는 가장 기본적인 도구들이죠.
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