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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8423
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dc.contributor.authorMajumder, Sayari-
dc.contributor.authorBidwai, Bhagyashri-
dc.contributor.authorVarsha, Bernadette-
dc.contributor.authorChaudhuri, Saptarishi-
dc.date.accessioned2025-08-04T11:19:48Z-
dc.date.available2025-08-04T11:19:48Z-
dc.date.issued2025-07-31-
dc.identifier.citationApplied Physics Letters, 2025, Vol.127, p044004en_US
dc.identifier.urihttp://hdl.handle.net/2289/8423-
dc.descriptionOpen Accessen_US
dc.description.abstractWe demonstrate a minimally perturbative detection method—Raman driven spin noise spectroscopy (RDSNS)—to directly probe the local density of a cloud of cold atoms in real time. The technique relies on detecting the polarization fluctuations of a far-off resonant focused probe light passing through the atoms, driven by two coherent Raman lasers connecting adjacent Zeeman spin states. This is an easily implementable scheme with a wide-ranging applicability in detecting cold atoms. Unlike traditional fluorescence and absorption imaging techniques, this approach does not require stochastic photon scattering from trapped atoms, thereby leaving the cold cloud unperturbed. The data can be collected in MHz refresh rate, allowing for near real-time detection. We validated this technique by monitoring the strength of the RDSNS signal by varying the key parameters of the three-dimensional magneto-optical trap (MOT) and the cold atom source (two-dimensional MOT). We performed experiments to probe local densities across the cold atom cloud using our technique and compared it with the inverse Abel-transformed density profiles extracted from the fluorescence of a spherically symmetric atomic cloud and found excellent agreement. This detection protocol is particularly advantageous for probing systems that lack inherent symmetry, where the Abel transformation is inapplicable. Moreover, RDSNS imaging is suitable for extracting the dynamical properties of systems in real time.en_US
dc.language.isoenen_US
dc.publisherAIP Publishingen_US
dc.relation.urihttps://doi.org/10.1063/5.0277027en_US
dc.rights2025 AIP Publishingen_US
dc.subjectFluorescenceen_US
dc.subjectAbsorption imagingen_US
dc.subjectSpin noise spectroscopyen_US
dc.subjectIntegral transformsen_US
dc.subjectPhoton scatteringen_US
dc.subjectMagneto-optical trapen_US
dc.subjectSpectrum analyzersen_US
dc.subjectLasersen_US
dc.subjectStochastic processesen_US
dc.titleReal-time local density probe for cold atoms utilizing Raman driven spin noise spectroscopyen_US
dc.typeArticleen_US
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