Publication Details:
Journal or Publication Title:
Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես
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Title:
Quantum Gravitational States of Ultracold Hydrogen near Liquid Helium Surface
Creator:
Gyoletsyan, A. ; Karakhanyan, R. ; Voronin, A.
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Uncontrolled Keywords:
quantum states ; ultracold hydrogen ; gravitational potential ; helium surface ; scattering length
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Abstract:
We study quantum gravitational states of ultracold hydrogen atoms in a combined potential consisting of H – 4He surface interaction potential and gravitational potential of the Earth. The key feature of this system is the dramatic separation of spatial (~104) and energy (~10-9) scales between potential components. We show that due to this separation, the influence of H – 4He surface interaction on gravitational states can be described with high accuracy by a boundary condition at zero, expressed through the scattering length. Our main result is the analysis of the near-resonant case, where the scattering length becomes large, revealing pronounced effects on gravitational states and highlighting the novel physical regimes accessible in this system.