other not [@agloading].

Single qubit addressing via the $^3$P$_2$ level
===============================================

We would like to be able to read out the state of a single qubit, or alternatively perform gate operations on a single qubit. The has been enormous recent process in individual addressing of sites in an optical lattice via optical means [@addweiss; @addchin; @addgreiner; @addgreiner2; @addbloch; @addbloch2; @addott; @addmeschede]. However, it would also be useful to be able to address individual qubits without the use of these techniques and the corresponding overheads in experiments. Such addressing can be achieved by coupling our dressed state qubit-selectively to states in the metastable $^3$P$_2$ level, and then detecting whether the atom is indeed present in the $^3$P$_2$ manifold. For the purpose of readout it is only necessary to be able to couple one of our two qubit states, e.g., the ${|0 \rangle}$ state (which could be represented, e.g., by $m_I=-9/2$ in $^{87}$Sr) to an auxilliary level ${|0x \rangle}$ in the $^3$P$_2$ level (e.g., the ${|^3{\rm P}_2,F=13/2,m_F=-13/2 \rangle}$ state, where $F$ is the total angular momentum quantum number $F$ and $m_F$ is the magnetic quantum number). The readout process is depicted schematically in Fig. \[fig:readoutlevels\]

![Schematic diagram of qubit readout. Qubits are 