期刊
EUROPEAN PHYSICAL JOURNAL D
卷 65, 期 1-2, 页码 207-217出版社
SPRINGER
DOI: 10.1140/epjd/e2011-20095-2
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资金
- DARPA
- NIST
- NSF
- Austrian Science Foundation (FWF) [SFB F40]
- ESF EuroQUAM network [I118-N16]
- EU Network NAMEQUAM
- EU Network AQUTE
- Division Of Physics
- Direct For Mathematical & Physical Scien [1125844] Funding Source: National Science Foundation
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 [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.
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