\begin{array}{ccc}
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& \qin{\lvert \psi_{t} \rangle~\mbox{part}~1~\mbox{on}~\{1~\ldotp \ldotp~t\}} & \qw
} \end{array} & \begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \gate{{\mathrm {FT}}^{\dag}_{t}~\mbox{part}~1~\mbox{on}~\{1~\ldotp \ldotp~t\}} & \qw
} \end{array} & \begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{{_{-}b}~\mbox{part}~1~\mbox{on}~\{1~\ldotp \ldotp~t\}}
} \end{array} \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& \qin{\lvert \psi_{t} \rangle~\mbox{part}~2~\mbox{on}~\{1~\ldotp \ldotp~t\}} & \qw
} \end{array} & \begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \gate{{\mathrm {FT}}^{\dag}_{t}~\mbox{part}~2~\mbox{on}~\{1~\ldotp \ldotp~t\}} & \qw
} \end{array} & \begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{{_{-}b}~\mbox{part}~2~\mbox{on}~\{1~\ldotp \ldotp~t\}}
} \end{array} \\
\vdots & \vdots & \vdots \\
\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& \qin{\lvert \psi_{t} \rangle~\mbox{part}~t~\mbox{on}~\{1~\ldotp \ldotp~t\}} & \qw
} \end{array} & \begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \gate{{\mathrm {FT}}^{\dag}_{t}~\mbox{part}~t~\mbox{on}~\{1~\ldotp \ldotp~t\}} & \qw
} \end{array} & \begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \qout{{_{-}b}~\mbox{part}~t~\mbox{on}~\{1~\ldotp \ldotp~t\}}
} \end{array} \\
\end{array}