Speaker
Description
Precise manipulation of a quantum degenerate gas can work for a quantum sensing for investigation of atom surface interactions owing to their high-sensitivity to electromagnetic fields such as van der Waals and Casimir-Polder potentials [1, 2]. In the vicinity of dielectric surface, particularly in the evanescent field region, theoretical models suggest that transition probabilities of optically forbidden transitions are enhanced more than several orders of magnitude [3].
We have experimentally investigated atom-surface interactions using a
$\mathrm{^{87}Rb}$ $F=1$ Bose-Einstein condensate (BEC). Pre-cooled atoms are loaded into an optical dipole trap [4] and transported to a glass surface region. We vertically adjust the position of the focal point of the trapping light in standing waves formed by the incident and reflected trapping beams at the distance of $10\,\mu\mathrm{m}$ from the surface. After the transportation, we decrease the temperature of the atoms by the evaporative cooling in the standing wave potential crossed with a vertically trap beam and create a BEC in the trap.
We study the dynamics of a BEC near a dielectric surface depending on evolution time and report on the oscillation behaviors of the BEC in the vicinity of the surface.
References
[1] Athanasios Laliotis, Bing-Sui Lu, Martial Ducloy, Daniel Bloch, and David Wilkowski, AVS Quantum Sci. 3, 043501 (2021).
[2] J. M. Obrecht, R. J. Wild, M. Antezza, L. P. Pitaevskii, S. Stringari, and E. A. Cornell, Phys. Rev. Lett. 98, 063201 (2007).
[3] Kosuke Shibata, Satoshi Tojo, and Daniel Bloch, Optics Express 25, 9476 (2017).
[4] Taro Mashimo, Masashi Abe, and Satoshi Tojo, Phys. Rev. A 100, 063426 (2019).
