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Investigation of Stochastic Resonance in Directed Propagation of Cold Atoms

Jiang, Kefeng
http://orcid.org/0000-0003-3254-8081
http://rave.ohiolink.edu/etdc/view?acc_num=miami1626991662334714

Abstract Details

2021, Master of Science, Miami University, Physics.
By illuminating a dissipative optical lattice with a weak frequency-scanning probe beam and detecting the probe transmission spectrum we observe a resonant enhancement in the directed propagation of cold atoms as we vary the photon scattering rate. The directed propagation is induced by probe intensities less than 1% of the total lattice intensity, and occurs perpendicular to probe propagation. Photon scattering disrupts Hamiltonian atomic motion in the reactive potentials and is thus viewed as noise, analogous to Brownian fluctuations in a thermal system. The resonant response of the system as a function of random environmental noise is a signature of stochastic resonance. We experimentally characterize the stochastic resonance as a function of system parameters such as probe intensity and lattice well-depth. A simple one dimensional model reveals how the probe-modified ground state potentials and optical pumping rates conspire to create directed atomic propagation within a randomly diffusing sample.
Samir Bali (Advisor)
Imran Mirza (Committee Member)
Edward Carlo Samson (Committee Member)
54 p.
Physics
cold atoms; optical lattice; stochastic resonance;

Recommended Citations

Citations

  • Jiang, K. (2021). Investigation of Stochastic Resonance in Directed Propagation of Cold Atoms [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1626991662334714

    APA Style (7th edition)

  • Jiang, Kefeng. Investigation of Stochastic Resonance in Directed Propagation of Cold Atoms. 2021. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1626991662334714.

    MLA Style (8th edition)

  • Jiang, Kefeng. "Investigation of Stochastic Resonance in Directed Propagation of Cold Atoms." Master's thesis, Miami University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1626991662334714

    Chicago Manual of Style (17th edition)

miami1626991662334714
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This open access ETD is published by Miami University and OhioLINK.