@article{34884, author = {{Prasannan, Nidhin and Sperling, Jan and Brecht, Benjamin and Silberhorn, Christine}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, keywords = {{General Physics and Astronomy}}, number = {{26}}, publisher = {{American Physical Society (APS)}}, title = {{{Direct Measurement of Higher-Order Nonlinear Polarization Squeezing}}}, doi = {{10.1103/physrevlett.129.263601}}, volume = {{129}}, year = {{2022}}, }