left-moving and right-moving Rindler modes but also Rindler modes with different frequencies. Together with Eqs. (\[UnruhRindler\]) and (\[UnruhRindler:inverse\]), we can construct a quantum circuit model (or input-output formalism) for the uniformly accelerated object. We start from the inertial frame in which Unruh modes are used instead of Minkowski modes. This makes the model simpler although we still have to transform the Minkowski modes to the Unruh modes and vice versa.

First, based on Eq. (\[UnruhRindler:inverse\]), the Unruh modes pass through a collection of two-mode squeezers each of which couples a pair of Unruh modes $(\hat{c}_{m\omega}, \hat{d}_{m\omega} )$ with frequency dependent squeezing parameter $r_{\omega}$. Second, the output right Rindler modes $\hat{b}_{m\omega}^R $ interact with the object and are transformed to $\hat{b}_{mk}^{\prime R}$ according to Eq. (\[generalcoupling\]) while the left Rindler modes $\hat{b}_{m\omega}^L$ remain unchanged. Finally, based on Eq. (\[UnruhRindler\]), the Rindler modes pass through a collection of two-mode antisqueezers and are transformed to output Unruh modes $(\hat{c}^{\prime}_{m\omega}, \hat{d}^{\prime}_{m\omega} )$. If we use an inertial detector to detect the radiation field from the accelerated object, we have to transform the Unruh modes $(\hat{c}^{\prime}_{m\omega}, \hat{d}^{\prime}_{m\omega} )$ to Minkowski modes to model the coupling with the detector.

In the special case that the interaction 