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arXiv · 2505.09447

Collective Excitation of Quantum Droplet with Different Ranges of the Interaction of P\"oschl-Teller Potential

Avra Banerjee·Dwipesh Majumder
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Abstract

In this article, we studied quantum droplet with the P\"oschl-Teller (PT) interaction potential between the Bose atoms. The Gross-Pitaevskii (GP) equation governs the system. The range and strength of the PT interaction can be adjusted. First, we studied the quantum droplet's density variation for various PT interaction parameters by the imaginary-time split-step Crank-Nicolson (CN) method. We then used the Bogoliubov theory to examine the collective excitation spectra. We observed that sharp roton forms and phonon modes are missing during long-range interactions. There is a gap at the zero momentum zone due to the long-range PT interaction, which increases with the range and strength of the interaction.

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Avra Banerjee, Dwipesh Majumder. 2025-05-14. Collective Excitation of Quantum Droplet with Different Ranges of the Interaction of P\"oschl-Teller Potential. https://doi.org/10.1088/1402-4896%2Fad5c19

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