dorsal/arxiv
View SchemaEntangling Dipole-Dipole Interactions and Quantum Logic in Optical Lattices
| Authors | G. K. Brennen, I. H. Deutsch, P. S. Jessen |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9910031 |
| URL | https://arxiv.org/abs/quant-ph/9910031 |
| DOI | 10.1103/PhysRevA.61.062309 |
Abstract
We study a means of creating multiparticle entanglement of neutral atoms using pairwise controlled dipole-dipole interactions in a three dimensional optical lattice. For tightly trapped atoms the dipolar interaction energy can be much larger than the photon scattering rate, and substantial coherent evolution of the two-atom state can be achieved before decoherence occurs. Excitation of the dipoles can be made conditional on the atomic states, allowing for deterministic generation of entanglement. We derive selection rules and a figure-of-merit for the dipole-dipole interaction matrix elements, for alkali atoms with hyperfine structure and trapped in well localized center of mass states. Different protocols are presented for implementing two-qubits quantum logic gates such as the controlled-phase and swap gate. We analyze the fidelity of our gate designs, imperfect due to decoherence from cooperative spontaneous emission and coherent couplings outside the logical basis. Outlines for extending our model to include the full molecular interactions potentials are discussed.
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"abstract": "We study a means of creating multiparticle entanglement of neutral atoms\nusing pairwise controlled dipole-dipole interactions in a three dimensional\noptical lattice. For tightly trapped atoms the dipolar interaction energy can\nbe much larger than the photon scattering rate, and substantial coherent\nevolution of the two-atom state can be achieved before decoherence occurs.\nExcitation of the dipoles can be made conditional on the atomic states,\nallowing for deterministic generation of entanglement. We derive selection\nrules and a figure-of-merit for the dipole-dipole interaction matrix elements,\nfor alkali atoms with hyperfine structure and trapped in well localized center\nof mass states. Different protocols are presented for implementing two-qubits\nquantum logic gates such as the controlled-phase and swap gate. We analyze the\nfidelity of our gate designs, imperfect due to decoherence from cooperative\nspontaneous emission and coherent couplings outside the logical basis. Outlines\nfor extending our model to include the full molecular interactions potentials\nare discussed.",
"arxiv_id": "quant-ph/9910031",
"authors": [
"G. K. Brennen",
"I. H. Deutsch",
"P. S. Jessen"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.61.062309",
"title": "Entangling Dipole-Dipole Interactions and Quantum Logic in Optical Lattices",
"url": "https://arxiv.org/abs/quant-ph/9910031"
},
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