A Chernoff-type Lower Bound for the Gaussian Q-function
  A lower bound for the Gaussian Q-function is presented in the form of a single exponential function with parametric order and weight. We prove the lower bound by introducing two functions, one related to the Q-function and the other similarly related to the exponential function, and by obtaining inequalities that indicate the sign of the difference of the two functions. 
Fran\c{c}ois D. C\^ot\'e, Ioannis N. Psaromiligkos, Warren J. Gross
math.PR