The only change to the paper is a sentence following up on Roman's comment about the increased light power between eLIGO and aLIGO.
" significant upgrade, known as Advanced LIGO~\cite{aLIGO2010}, is currently underway with the goal of increasing the strain sensitivity of the LIGO detectors by a factor of 10. An important element of the improved sensitivity is the increased light power. "
Public outreach science summary:
http://www.ligo.org/science/Publication-SqueezedVacuum/index.php
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