dorsal/arxiv
View SchemaApplicability of Rydberg atoms to quantum computers
| Authors | Igor I. Ryabtsev, Denis B. Tretyakov, Ilya I. Beterov |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402006 |
| URL | https://arxiv.org/abs/quant-ph/0402006 |
| DOI | 10.1088/0953-4075/38/2/032 |
| Journal | Shorter version in J. Phys. B: At. Mol. Opt. Phys. 38 (2005) S421--S436 |
Abstract
Applicability of Rydberg atoms to quantum computers is examined from experimental point of view. In many theoretical proposals appeared recently, excitation of atoms into highly excited Rydberg states was considered as a way to achieve quantum entanglement in cold atomic ensembles via dipole-dipole interaction that could be strong for Rydberg atoms. Appropriate conditions to realize a conditional quantum phase gate have been analyzed. We also present the results of modeling experiments on microwave spectroscopy of single- and multi-atom excitations at the one-photon 37S-37P and two-photon 37S-38S transitions in an ensemble of a few sodium Rydberg atoms. The microwave spectra were investigated for various final states of the ensemble initially prepared in its ground state. The quantum NOT operation with single atoms was found to be affected by the Doppler effect and fluctuations of the microwave field. The spectrum of full excitation of several Rydberg atoms was much narrower than that of a single atom. This effect might be useful for the high-resolution spectroscopy. The results may be also applied to the studies on collective laser excitation of ground-state atoms aiming to realize quantum gates.
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"abstract": "Applicability of Rydberg atoms to quantum computers is examined from\nexperimental point of view. In many theoretical proposals appeared recently,\nexcitation of atoms into highly excited Rydberg states was considered as a way\nto achieve quantum entanglement in cold atomic ensembles via dipole-dipole\ninteraction that could be strong for Rydberg atoms. Appropriate conditions to\nrealize a conditional quantum phase gate have been analyzed. We also present\nthe results of modeling experiments on microwave spectroscopy of single- and\nmulti-atom excitations at the one-photon 37S-37P and two-photon 37S-38S\ntransitions in an ensemble of a few sodium Rydberg atoms. The microwave spectra\nwere investigated for various final states of the ensemble initially prepared\nin its ground state. The quantum NOT operation with single atoms was found to\nbe affected by the Doppler effect and fluctuations of the microwave field. The\nspectrum of full excitation of several Rydberg atoms was much narrower than\nthat of a single atom. This effect might be useful for the high-resolution\nspectroscopy. The results may be also applied to the studies on collective\nlaser excitation of ground-state atoms aiming to realize quantum gates.",
"arxiv_id": "quant-ph/0402006",
"authors": [
"Igor I. Ryabtsev",
"Denis B. Tretyakov",
"Ilya I. Beterov"
],
"categories": [
"quant-ph",
"physics.atom-ph"
],
"doi": "10.1088/0953-4075/38/2/032",
"journal_ref": "Shorter version in J. Phys. B: At. Mol. Opt. Phys. 38 (2005)\n S421--S436",
"title": "Applicability of Rydberg atoms to quantum computers",
"url": "https://arxiv.org/abs/quant-ph/0402006"
},
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