Details
| Original language | English |
|---|---|
| Article number | 034004 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Volume | 50 |
| Issue number | 3 |
| Publication status | Published - 17 Jan 2017 |
Abstract
We demonstrate that a dispersive imaging technique based on the Faraday effect can measure the atom number in a large, ultracold atom cloud with a precision below the atom shot noise level. The minimally destructive character of the technique allows us to take multiple images of the same cloud, which enables sub-atom shot noise measurement precision of the atom number and allows for an in situ determination of the measurement precision. We have developed a noise model that quantitatively describes the noise contributions due to photon shot noise in the detected light and the noise associated with single atom loss. This model contains no free parameters and is calculated through an analysis of the fluctuations in the acquired images. For clouds containing atoms, we achieve a precision more than a factor of two below the atom shot noise level.
Keywords
- dispersive imaging, Faraday rotation, non-destructive imaging, sub atom shot noise detection, ultracold atom clouds
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 50, No. 3, 034004, 17.01.2017.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Sub-atom shot noise Faraday imaging of ultracold atom clouds
AU - Kristensen, M. A.
AU - Gajdacz, M.
AU - Pedersen, P. L.
AU - Klempt, C.
AU - Sherson, J. F.
AU - Arlt, J. J.
AU - Hilliard, A. J.
PY - 2017/1/17
Y1 - 2017/1/17
N2 - We demonstrate that a dispersive imaging technique based on the Faraday effect can measure the atom number in a large, ultracold atom cloud with a precision below the atom shot noise level. The minimally destructive character of the technique allows us to take multiple images of the same cloud, which enables sub-atom shot noise measurement precision of the atom number and allows for an in situ determination of the measurement precision. We have developed a noise model that quantitatively describes the noise contributions due to photon shot noise in the detected light and the noise associated with single atom loss. This model contains no free parameters and is calculated through an analysis of the fluctuations in the acquired images. For clouds containing atoms, we achieve a precision more than a factor of two below the atom shot noise level.
AB - We demonstrate that a dispersive imaging technique based on the Faraday effect can measure the atom number in a large, ultracold atom cloud with a precision below the atom shot noise level. The minimally destructive character of the technique allows us to take multiple images of the same cloud, which enables sub-atom shot noise measurement precision of the atom number and allows for an in situ determination of the measurement precision. We have developed a noise model that quantitatively describes the noise contributions due to photon shot noise in the detected light and the noise associated with single atom loss. This model contains no free parameters and is calculated through an analysis of the fluctuations in the acquired images. For clouds containing atoms, we achieve a precision more than a factor of two below the atom shot noise level.
KW - dispersive imaging
KW - Faraday rotation
KW - non-destructive imaging
KW - sub atom shot noise detection
KW - ultracold atom clouds
UR - http://www.scopus.com/inward/record.url?scp=85010063112&partnerID=8YFLogxK
U2 - 10.1088/1361-6455/50/3/034004
DO - 10.1088/1361-6455/50/3/034004
M3 - Article
AN - SCOPUS:85010063112
VL - 50
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
SN - 0953-4075
IS - 3
M1 - 034004
ER -