= Coherent state
{wiki=Coherent_state}
A coherent state is a specific type of quantum state of a harmonic oscillator that exhibits properties reminiscent of classical oscillators. In quantum mechanics, a coherent state is often associated with the eigenstates of the annihilation operator in the context of quantum optics and quantum mechanics of harmonic oscillators. Key characteristics of coherent states include: 1. **Minimum Uncertainty**: Coherent states minimize the uncertainty relation between position and momentum; they achieve the Heisenberg uncertainty principle's lower bound.
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