Related papers: Stochastic Liouville-transport theory of light-atom interaction noise in thermal atomic vapors

Stochastic Liouville-transport theory of light-atom interaction noise in thermal atomic vapors

URL: http://arxiv.org/abs/2608.15130v1
Date: Sat, 15 Aug 2026 09:08:20 GMT
Title: Stochastic Liouville-transport theory of light-atom interaction noise in thermal atomic vapors
Abstract summary: Liouville-transport theory is tested against polarization resonant Cs D$dominated spectra.<n>Joint experiment-theory analysis identifies atom-light noise below 100 kHz as transit-dominated.<n> framework can analyze noise in other thermal-atom sensors, including Rydberg electric-field measurements.
Score: 10.994733209864803
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Atom-light interaction noise can limit thermal-vapor sensing. Existing theories often treat internal-state dynamics, finite-mode atomic motion, and stochastic renewal separately, obscuring their coupled contributions to measured noise. We develop a general stochastic Liouville-transport theory, tested against polarization-resolved resonant Cs D$_2$ spectra. Joint experiment-theory analysis identifies atom-light noise below approximately 100 kHz as transit-dominated. Ballistic motion through the finite Gaussian mode modulates both the coupling-weighted effective atom number and trajectory-dependent Rabi coupling, producing predominantly common-mode noise. Boundary renewal introduces atoms with independently sampled ground-state sublevels, generating differential population fluctuations with opposite effects on the circular channels. Under an applied longitudinal magnetic field, experiment and theory show the same qualitative nonmonotonic change in common-mode suppression, supporting Zeeman redistribution of the channel responses. The framework can analyze noise in other thermal-atom sensors, including Rydberg-atom electric-field measurements.

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