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| ~ ∞ ~ Quantum Coherence ~ ∞ ~ |
Quantum Coherence and Quantum Entanglement are two landmark features of Quantum Physics – they are two sides of the same coin, meaning that coherence and entanglement are operationally equivalent but conceptually different; coherence can be present in single quantum systems, where entanglement is not so well-defined – both are rooted in the superposition principle, which plays an essential role in Quantum Technologies. such as Quantum Teleportation, Quantum Cryptography, and Super Dense Coding.
Quantum Coherence lies at the heart of Quantum Computing, in which a Quantum Bit (Qubit) is in a superposition of the “0” and “1” states, resulting in a speed-up over various classical algorithms; when such a state experiences decoherence, however, all of its quantumness is typically lost and the advantage vanishes.
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