dorsal/arxiv
View SchemaEcho spectroscopy and quantum stability of trapped atoms
| Authors | M. F. Andersen, A. Kaplan, N. Davidson |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0208052 |
| URL | https://arxiv.org/abs/quant-ph/0208052 |
| DOI | 10.1103/PhysRevLett.90.023001 |
| Journal | Phys. Rev. Lett. 90, 023001 (2003) |
Abstract
We investigate the dephasing of ultra cold ^{85}Rb atoms trapped in an optical dipole trap and prepared in a coherent superposition of their two hyperfine ground states by interaction with a microwave pulse. We demonstrate that the dephasing, measured as the Ramsey fringe contrast, can be reversed by stimulating a coherence echo with a pi-pulse between the two pi/2 pulses, in analogy to the photon echo. We also demonstrate that the failure of the echo for certain trap parameters is due to dynamics in the trap, and thereby that ''echo spectroscopy'' can be used to study the quantum dynamics in the trap even when more than 10^6 states are thermally populated, and to study the crossover from quantum (where dynamical decoherence is supressed) to classical dynamics.
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"abstract": "We investigate the dephasing of ultra cold ^{85}Rb atoms trapped in an\noptical dipole trap and prepared in a coherent superposition of their two\nhyperfine ground states by interaction with a microwave pulse. We demonstrate\nthat the dephasing, measured as the Ramsey fringe contrast, can be reversed by\nstimulating a coherence echo with a pi-pulse between the two pi/2 pulses, in\nanalogy to the photon echo. We also demonstrate that the failure of the echo\nfor certain trap parameters is due to dynamics in the trap, and thereby that\n\u0027\u0027echo spectroscopy\u0027\u0027 can be used to study the quantum dynamics in the trap\neven when more than 10^6 states are thermally populated, and to study the\ncrossover from quantum (where dynamical decoherence is supressed) to classical\ndynamics.",
"arxiv_id": "quant-ph/0208052",
"authors": [
"M. F. Andersen",
"A. Kaplan",
"N. Davidson"
],
"categories": [
"quant-ph",
"nlin.CD",
"physics.atom-ph"
],
"doi": "10.1103/PhysRevLett.90.023001",
"journal_ref": "Phys. Rev. Lett. 90, 023001 (2003)",
"title": "Echo spectroscopy and quantum stability of trapped atoms",
"url": "https://arxiv.org/abs/quant-ph/0208052"
},
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