dorsal/arxiv
View SchemaCoherent control in a decoherence-free subspace of a collective multi-level system
| Authors | M. Kiffner, J. Evers, C. H. Keitel |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0611084 |
| URL | https://arxiv.org/abs/quant-ph/0611084 |
| DOI | 10.1103/PhysRevA.75.032313 |
| Journal | Phys. Rev. A 75, 032313 (2007) |
Abstract
Decoherence-free subspaces (DFS) in systems of dipole-dipole interacting multi-level atoms are investigated theoretically. It is shown that the collective state space of two dipole-dipole interacting four-level atoms contains a four-dimensional DFS. We describe a method that allows to populate the antisymmetric states of the DFS by means of a laser field, without the need of a field gradient between the two atoms. We identify these antisymmetric states as long-lived entangled states. Further, we show that any single-qubit operation between two states of the DFS can be induced by means of a microwave field. Typical operation times of these qubit rotations can be significantly shorter than for a nuclear spin system.
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"abstract": "Decoherence-free subspaces (DFS) in systems of dipole-dipole interacting\nmulti-level atoms are investigated theoretically. It is shown that the\ncollective state space of two dipole-dipole interacting four-level atoms\ncontains a four-dimensional DFS. We describe a method that allows to populate\nthe antisymmetric states of the DFS by means of a laser field, without the need\nof a field gradient between the two atoms. We identify these antisymmetric\nstates as long-lived entangled states. Further, we show that any single-qubit\noperation between two states of the DFS can be induced by means of a microwave\nfield. Typical operation times of these qubit rotations can be significantly\nshorter than for a nuclear spin system.",
"arxiv_id": "quant-ph/0611084",
"authors": [
"M. Kiffner",
"J. Evers",
"C. H. Keitel"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.75.032313",
"journal_ref": "Phys. Rev. A 75, 032313 (2007)",
"title": "Coherent control in a decoherence-free subspace of a collective multi-level system",
"url": "https://arxiv.org/abs/quant-ph/0611084"
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