Persistent and enhanced spin-nematic squeezing in a spinor Bose-Einstein condensate

2021 ◽  
Author(s):  
Xinfang Li ◽  
Jianning Liu ◽  
Osei Seth ◽  
Heng-Na Xiong ◽  
Qingshou Tan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Measurement ◽  
Einstein Condensate ◽  
Phase Sensitivity ◽  
Squeezed State ◽  
Simple Scheme ◽  
Bose Einstein Condensate ◽  
Fixed Direction ◽  
Bose Einstein ◽  
Initial Magnetic Field

Abstract We propose a simple scheme to realize the persistent spin-nematic squeezing in a spinor Bose-Einstein condensate by rapidly turning-off the external magnetic field at a time that maximal spin-nematic squeezing occurs. We observe that the optimal spinnematic squeezing can be maintained in a nearly fixed direction. For a proper initial magnetic field, the optimal squeezing can be obviously enhanced. We further construct a spin-mixing interferometer, where the quantum correlation of the squeezed state (generated by our scheme) is fully utilized in the phase measurement, and show the phase sensitivity of the interferometer has a significant enhancement.

scholarly journals Three-Dimensional Skyrmions with Arbitrary Topological Number in a Ferromagnetic Spin-1 Bose-Einstein Condensate

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Huan-Bo Luo ◽  
Lu Li ◽  
Wu-Ming Liu
Keyword(s):  
Magnetic Field ◽  
Vortex Ring ◽  
Three Dimensional ◽  
Einstein Condensate ◽  
Laser Beams ◽  
Quantization Axis ◽  
Density Distributions ◽  
Bose Einstein Condensate ◽  
Bose Einstein ◽  
Topological Number

AbstractWe propose a new scheme for creating three-dimensional Skyrmions in a ferromagnetic spin-1 Bose-Einstein condensate by manipulating a multipole magnetic field and a pair of counter-propagating laser beams. The result shows that a three-dimensional Skyrmion with topological number Q = 2 can be created by a sextupole magnetic field and the laser beams. Meanwhile, the vortex ring and knot structure in the Skyrmion are found. The topological number can be calculated analytically in our model, which implies that the method can be extended to create Skyrmions with arbitrary topological number. As the examples, three-dimensional Skyrmions with Q = 3, 4 are also demonstrated and are distinguishable by the density distributions with a specific quantization axis. These topological objects have the potential to be realized in ferromagnetic spin-1 Bose-Einstein condensates experimentally.

scholarly journals SU(3) Spin–Orbit Coupled Rotating Bose–Einstein Condensate Subject to a Gradient Magnetic Field

2021 ◽  
Vol 9 ◽  
Author(s):  
Guang-Ping Chen ◽  
Pu Tu ◽  
Chang-Bing Qiao ◽  
Jin-Xia Zhu ◽  
Qi Jia ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Einstein Condensate ◽  
Orbit Coupling ◽  
Ground State Structure ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
State Structure ◽  
Gradient Magnetic Field ◽  
Bose Einstein Condensate ◽  
Bose Einstein

We consider a harmonically trapped rotating spin-1 Bose–Einstein condensate with SU(3) spin–orbit coupling subject to a gradient magnetic field. The effects of SU(3) spin–orbit coupling, rotation, and gradient magnetic field on the ground-state structure of the system are investigated in detail. Our results show that the interplay among SU(3) spin–orbit coupling, rotation, and gradient magnetic field can result in a variety of ground states, such as a vortex ring and clover-type structure. The numerical results agree well with our variational analysis results.

Stability and superfluidity of the Bose-Einstein condensate in a two-leg ladder with magnetic field

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
Yue Jian ◽  
Xin Qiao ◽  
Jun-Cheng Liang ◽  
Zi-Fa Yu ◽  
Ai-Xia Zhang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein
Sign in / Sign up

Export Citation Format

Share Document