dorsal/arxiv
View SchemaFurther quantum-gate methods using selective displacement of trapped ions
| Authors | Marek Sasura, Andrew Steane |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402054 |
| URL | https://arxiv.org/abs/quant-ph/0402054 |
Abstract
We consider quantum gates for trapped ions using state-selective displacement of the ions. We generalize earlier work in order to treat arbitrary separations between the traps. This requires the impact of anharmonicity arising from the Coulomb interaction to be estimated. We show that its effects are always small enough to allow high fidelity. In particular, the method can be applied to two ions in the same trap. We also show that gates between non-neighbour ions, and hence a Toffoli (three-qubit controlled-NOT) gate, can be achieved. We discuss how the gate can be applied to logical qubits encoded in the decoherence-free-subspace {|01>,|10>}, where each pair of ions stores a single qubit. We also suggest alternatives to the spin-echo method to suppress unwanted terms in the evolution.
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"abstract": "We consider quantum gates for trapped ions using state-selective displacement\nof the ions. We generalize earlier work in order to treat arbitrary separations\nbetween the traps. This requires the impact of anharmonicity arising from the\nCoulomb interaction to be estimated. We show that its effects are always small\nenough to allow high fidelity. In particular, the method can be applied to two\nions in the same trap. We also show that gates between non-neighbour ions, and\nhence a Toffoli (three-qubit controlled-NOT) gate, can be achieved. We discuss\nhow the gate can be applied to logical qubits encoded in the\ndecoherence-free-subspace {|01\u003e,|10\u003e}, where each pair of ions stores a single\nqubit. We also suggest alternatives to the spin-echo method to suppress\nunwanted terms in the evolution.",
"arxiv_id": "quant-ph/0402054",
"authors": [
"Marek Sasura",
"Andrew Steane"
],
"categories": [
"quant-ph"
],
"title": "Further quantum-gate methods using selective displacement of trapped ions",
"url": "https://arxiv.org/abs/quant-ph/0402054"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "a2f487b0-ce2c-4635-9385-5c08fa31dba4",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
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