Note that the rate e pends on both the cav Eq. 13 and the quant G(! ! 0 ) in Eq. A10. volution theorem to eva detailed discussions are tunately, a closed analy stead, we numerically e using a spectral density in Ref. 60. However, we alytic expressions for th in Eq. 44 are available Markovian limit for the (Eq. 16). Similar expre Markovian case.