Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 24: Poster II

Q 24.5: Poster

Tuesday, March 12, 2024, 17:00–19:00, KG I Foyer

Collective oscillation modes of dipolar quantum droplets — •Denis Mujo and Antun Balaž — Center for the Study of Complex Systems, Institute of Physics Belgrade, University of Belgrade, Serbia

Since the first experimental realization of quantum droplets in dipolar Bose systems [1], it was shown [2] that they are stabilized against the collapse due to quantum fluctuations that correspond to the shift of the chemical potential [3]. We examine the behavior of collective oscillation modes of self-bound dipolar quantum droplets using a variational and numerical approach. We focus on cylindrically symmetric states and variationally derive frequencies and eigenvectors of low-lying collective modes, i.e., the breathing and the quadrupole mode. The obtained results are compared to full 3D numerical simulations based on the extended Gross-Pitaevskii equation, which includes both the quantum fluctuation and condensate depletion terms.
[1] H. Kadau et al., Nature 530, 194 (2016).

[2] I. Ferrier-Barbut et al., Phys. Rev. Lett. 116, 215301 (2016).

[3] A. R. P. Lima and A. Pelster, Phys. Rev. A 84, 041604(R) (2011); [3] Phys. Rev. A 86, 063609 (2012).

Keywords: Quantum droplets; Dipolar condensates; Collective oscillation modes