dorsal/arxiv
View SchemaQuantum computation with two-level trapped cold ions beyond Lamb-Dicke limit
| Authors | L. F. Wei, S. Y. Liu, X. L. Lei |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0205077 |
| URL | https://arxiv.org/abs/quant-ph/0205077 |
| DOI | 10.1103/PhysRevA.65.062316 |
| Journal | Phys. Rev. A 65, 062316 (2002) |
Abstract
We propose a simple scheme for implementing quantum logic gates with a string of two-level trapped cold ions outside the Lamb-Dicke limit. Two internal states of each ion are used as one computational qubit (CQ) and the collective vibration of ions acts as the information bus, i.e., bus qubit (BQ). Using the quantum dynamics for the laser-ion interaction as described by a generalized Jaynes-Cummings model, we show that quantum entanglement between any one CQ and the BQ can be coherently manipulated by applying classical laser beams. As a result, universal quantum gates, i.e. the one-qubit rotation and two-qubit controlled gates, can be implemented exactly. The required experimental parameters for the implementation, including the Lamb-Dicke (LD) parameter and the durations of the applied laser pulses, are derived. Neither the LD approximation for the laser-ion interaction nor the auxiliary atomic level is needed in the present scheme.
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"abstract": "We propose a simple scheme for implementing quantum logic gates with a string\nof two-level trapped cold ions outside the Lamb-Dicke limit. Two internal\nstates of each ion are used as one computational qubit (CQ) and the collective\nvibration of ions acts as the information bus, i.e., bus qubit (BQ). Using the\nquantum dynamics for the laser-ion interaction as described by a generalized\nJaynes-Cummings model, we show that quantum entanglement between any one CQ and\nthe BQ can be coherently manipulated by applying classical laser beams. As a\nresult, universal quantum gates, i.e. the one-qubit rotation and two-qubit\ncontrolled gates, can be implemented exactly. The required experimental\nparameters for the implementation, including the Lamb-Dicke (LD) parameter and\nthe durations of the applied laser pulses, are derived. Neither the LD\napproximation for the laser-ion interaction nor the auxiliary atomic level is\nneeded in the present scheme.",
"arxiv_id": "quant-ph/0205077",
"authors": [
"L. F. Wei",
"S. Y. Liu",
"X. L. Lei"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.65.062316",
"journal_ref": "Phys. Rev. A 65, 062316 (2002)",
"title": "Quantum computation with two-level trapped cold ions beyond Lamb-Dicke limit",
"url": "https://arxiv.org/abs/quant-ph/0205077"
},
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