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abstract: 'Recent experimental progress with Alkaline-Earth atoms has opened the door to quantum computing schemes in which qubits are encoded in long-lived nuclear spin states, and the metastable electronic states of these species are used for manipulation and readout of the qubits. Here we discuss a variant of these schemes, in which gate operations are performed in *nuclear-spin-dependent* optical lattices, formed by near-resonant coupling to the metastable excited state. This provides an alternative to a previous scheme \[A. J. Daley, M. M. Boyd, J. Ye, and P. Zoller, Phys. Rev. Lett **101**, 170504 (2008)\], which involved independent lattices for different *electronic* states. As in the previous case, we show how existing ideas for quantum computing with Alkali atoms such as entanglement via controlled collisions can be freed from important technical restrictions. We also provide additional details on the use of collisional losses from metastable states to perform gate operations via a lossy blockade mechanism.'
author:
- 'Andrew J. Daley'
- Jun Ye
- Peter Zoller
title: 'State-dependent lattices for quantum computing with alkaline-earth-metal atoms'
---

Introduction
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There has been a lot of recent experimental progress in cooling and manipulating alkaline-earth and alkaline-earth-like atoms in the laboratory, especially in 