TY - JOUR AU - Xunnong Xu AU - Jacob Taylor C2 - Physical Review Letters DA - 2014-10-21 00:10:00 DO - https://doi.org/10.1103/PhysRevA.90.043848 LA - en PB - Physical Review Letters PY - 2014 TI - Beating the standard quantum limit for force sensing with coupled two-mode optomechanical system ER -