dorsal/arxiv
View SchemaNoise sensitivity of an atomic velocity sensor
| Authors | Pierre Cladé, Saïda Guellati-Khélifa, Catherine Schwob, François Nez, Lucile Julien, François Biraben |
|---|---|
| Categories | |
| ArXiv ID | physics/0503096 |
| URL | https://arxiv.org/abs/physics/0503096 |
| DOI | 10.1140/epjd/e2005-00064-2 |
Abstract
We use Bloch oscillations to accelerate coherently Rubidium atoms. The variation of the velocity induced by this acceleration is an integer number times the recoil velocity due to the absorption of one photon. The measurement of the velocity variation is achieved using two velocity selective Raman pi-pulses: the first pulse transfers atoms from the hyperfine state 5S1/2 |F=2, mF=0> to 5S1/2, |F=1, mF = 0> into a narrow velocity class. After the acceleration of this selected atomic slice, we apply the second Raman pulse to bring the resonant atoms back to the initial state 5S1/2, |F=2, mF = 0>. The populations in (F=1 and F=2) are measured separately by using a one-dimensional time-of-flight technique. To plot the final velocity distribution we repeat this procedure by scanning the Raman beam frequency of the second pulse. This two pi-pulses system constitutes then a velocity sensor. Any noise in the relative phase shift of the Raman beams induces an error in the measured velocity. In this paper we present a theoretical and an experimental analysis of this velocity sensor, which take into account the phase fluctuations during the Raman pulses.
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"abstract": "We use Bloch oscillations to accelerate coherently Rubidium atoms. The\nvariation of the velocity induced by this acceleration is an integer number\ntimes the recoil velocity due to the absorption of one photon. The measurement\nof the velocity variation is achieved using two velocity selective Raman\npi-pulses: the first pulse transfers atoms from the hyperfine state 5S1/2 |F=2,\nmF=0\u003e to 5S1/2, |F=1, mF = 0\u003e into a narrow velocity class. After the\nacceleration of this selected atomic slice, we apply the second Raman pulse to\nbring the resonant atoms back to the initial state 5S1/2, |F=2, mF = 0\u003e. The\npopulations in (F=1 and F=2) are measured separately by using a one-dimensional\ntime-of-flight technique. To plot the final velocity distribution we repeat\nthis procedure by scanning the Raman beam frequency of the second pulse. This\ntwo pi-pulses system constitutes then a velocity sensor. Any noise in the\nrelative phase shift of the Raman beams induces an error in the measured\nvelocity. In this paper we present a theoretical and an experimental analysis\nof this velocity sensor, which take into account the phase fluctuations during\nthe Raman pulses.",
"arxiv_id": "physics/0503096",
"authors": [
"Pierre Clad\u00e9",
"Sa\u00efda Guellati-Kh\u00e9lifa",
"Catherine Schwob",
"Fran\u00e7ois Nez",
"Lucile Julien",
"Fran\u00e7ois Biraben"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1140/epjd/e2005-00064-2",
"title": "Noise sensitivity of an atomic velocity sensor",
"url": "https://arxiv.org/abs/physics/0503096"
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