@ARTICLE{Ast2016, title = {{R}eduction of {C}lassical {M}easurement {N}oise via {Q}uantum-{D}ense {M}etrology}, status = {}, author = {Ast, M., Steinlechner, S. and Schnabel, R.}, journal = {Physical Review Letters}, volume = {117}, pages = {180801}, year = {2016}, }