deletions | additions       diff --git a/subsection_Quadrature_Noise_The_motion__.tex b/subsection_Quadrature_Noise_The_motion__.tex  index 435618d..0bc2b34 100644  --- a/subsection_Quadrature_Noise_The_motion__.tex  +++ b/subsection_Quadrature_Noise_The_motion__.tex 
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As in the case of the harmonic oscillator, it's impossible to exactly determine $X(t)$ and $Y(t)$ for a given $t$ - there's an amount of uncertainty that can be due to classical noise or quantum uncertainty relations.  The quadrature components usually satisfy the uncertainty relation   \[\Delta X \Delta Y \geq 1 \]  States that minimize this relation are called coherent states, it's possible to decrease the uncertainty in one quadrature component at the expense of the other - these are called Squeezed Coherent States.   
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