I am confused. In harmonic oscillator problem in quantum mechanics eigenstates of operator ##\hat{a}## are called coherent states. So we practically get Gaussian. In problem of quantum linear harmonic oscillator we have phonons ##|n \rangle##. In case of laser we have photons ##|n \rangle##. Could you explain me what kind of coherence do we have in ground state of harmonic oscillator?(adsbygoogle = window.adsbygoogle || []).push({});

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# A Coherent state -- Lasers

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