@article{1304511, author = {Florent Lecocq and Leonardo Ranzani and Gabriel Peterson and Katarina Cicak and Anja Metelmann and Shlomi Kotler and Raymond Simmonds and John Teufel and Jose Aumentado}, title = {Microwave measurement beyond the quantum limit with a nonreciprocal amplifier}, year = {2020}, month = {2020-04-02 04:04:00}, publisher = {Physical Review Letters}, language = {en}, }