2018/03/28 by Yijun Tang, Wil Kao, Kuan-Yu Li +2 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dipole #Lattice (music) #Magnetic dipole #Magnetic dipole–dipole interaction #Magnetic field #Mechanics #Physics #Quantum #Quantum mechanics #Quantum, superfluid, helium dynamics #Rotation (mathematics) #Vortex #cond-mat.quant-gas #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physrevlett.120.230401
published as Phys. Rev. Lett. 120, 230401 (2018) · 5 pages, 4 figures
arxiv created 2018/03/28 · openalex publication_date 2018/06/04 · arxiv updated 2018/06/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We demonstrate the tuning of the magnetic dipole-dipole interaction (DDI) within a dysprosium Bose-Einstein condensate by rapidly rotating the orientation of the atomic dipoles. The tunability of the dipolar mean-field energy manifests as a modified gas aspect ratio after time-of-flight expansion. We demonstrate that both the magnitude and the sign of the DDI can be tuned using this technique. In particular, we show that a magic rotation angle exists at which the mean-field DDI can be eliminated, and at this angle, we observe that the expansion dynamics of the condensate is close to that predicted for a nondipolar gas. The ability to tune the strength of the DDI opens new avenues toward the creation of exotic soliton and vortex states as well as unusual quantum lattice phases and Weyl superfluids.