Hollow cylindrical droplets in a very strongly dipolar condensate
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908466150375424 |
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| author | Adhikari, S. K. |
| author_facet | Adhikari, S. K. |
| contents | A harmonically trapped Bose-Einstein condensate (BEC) leads to topologically trivial compact states. Because of the long-range nonlocal dipole-dipole interaction, a strongly dipolar BEC revealed many novel phenomena. Here we show that in a strongly dipolar BEC one can have a hollow cylindrical quasi-one-dimensional metastable droplet with ring topology while the system is trapped only in the $x$-$y$ plane by a harmonic potential and a Gaussian hill potential at the center and untrapped along the polarization $z$ axis. In this numerical investigation we use the imaginary-time propagation of a mean-field model where we include the Lee-Huang-Yang interaction, suitably modified for dipolar systems. Being metastable, these droplets are weakly stable and we use real-time propagation to investigate its dynamics and establish stability. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_10396 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hollow cylindrical droplets in a very strongly dipolar condensate Adhikari, S. K. Quantum Gases A harmonically trapped Bose-Einstein condensate (BEC) leads to topologically trivial compact states. Because of the long-range nonlocal dipole-dipole interaction, a strongly dipolar BEC revealed many novel phenomena. Here we show that in a strongly dipolar BEC one can have a hollow cylindrical quasi-one-dimensional metastable droplet with ring topology while the system is trapped only in the $x$-$y$ plane by a harmonic potential and a Gaussian hill potential at the center and untrapped along the polarization $z$ axis. In this numerical investigation we use the imaginary-time propagation of a mean-field model where we include the Lee-Huang-Yang interaction, suitably modified for dipolar systems. Being metastable, these droplets are weakly stable and we use real-time propagation to investigate its dynamics and establish stability. |
| title | Hollow cylindrical droplets in a very strongly dipolar condensate |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2507.10396 |