dorsal/arxiv
View SchemaArbitrary state controlled-unitary gate by adiabatic passage
| Authors | X. Lacour, N. Sangouard, S. Guerin, H. R. Jauslin |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0601183 |
| URL | https://arxiv.org/abs/quant-ph/0601183 |
| DOI | 10.1103/PhysRevA.73.042321 |
| Journal | Phys. Rev. A 73, 042321 (2006) |
Abstract
We propose a robust scheme involving atoms fixed in an optical cavity to directly implement the universal controlled-unitary gate. The present technique based on adiabatic passage uses novel dark states well suited for the controlled-rotation operation. We show that these dark states allow the robust implementation of a gate that is a generalisation of the controlled-unitary gate to the case where the control qubit can be selected to be an arbitrary state. This gate has potential applications to the rapid implementation of quantum algorithms such as of the projective measurement algorithm. This process is decoherence-free since excited atomic states and cavity modes are not populated during the dynamics.
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"abstract": "We propose a robust scheme involving atoms fixed in an optical cavity to\ndirectly implement the universal controlled-unitary gate. The present technique\nbased on adiabatic passage uses novel dark states well suited for the\ncontrolled-rotation operation. We show that these dark states allow the robust\nimplementation of a gate that is a generalisation of the controlled-unitary\ngate to the case where the control qubit can be selected to be an arbitrary\nstate. This gate has potential applications to the rapid implementation of\nquantum algorithms such as of the projective measurement algorithm. This\nprocess is decoherence-free since excited atomic states and cavity modes are\nnot populated during the dynamics.",
"arxiv_id": "quant-ph/0601183",
"authors": [
"X. Lacour",
"N. Sangouard",
"S. Guerin",
"H. R. Jauslin"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.042321",
"journal_ref": "Phys. Rev. A 73, 042321 (2006)",
"title": "Arbitrary state controlled-unitary gate by adiabatic passage",
"url": "https://arxiv.org/abs/quant-ph/0601183"
},
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