scholarly journals Spin symmetry breaking and entropy production during the evolution of spinor Bose-Einstein condensate driven by coherent atom beam

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Yixin Xu ◽  
Zhongda Zeng ◽  
Zbigniew Domanski ◽  
Zhibing Li
Keyword(s):  
Symmetry Breaking ◽  
Entropy Production ◽  
Spin Symmetry ◽  
Einstein Condensate ◽  
Atom Beam ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose–Einstein condensate

Nature ◽  
2006 ◽  
Vol 443 (7109) ◽  
pp. 312-315 ◽  
Author(s):  
L. E. Sadler ◽  
J. M. Higbie ◽  
S. R. Leslie ◽  
M. Vengalattore ◽  
D. M. Stamper-Kurn
Keyword(s):  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Symmetry breaking and tunneling dynamics of a dipolar Bose–Einstein condensate in a double-well potential

2018 ◽  
Vol 96 (6) ◽  
pp. 622-626 ◽  
Author(s):  
Yuan Sheng Wang ◽  
Ping Long ◽  
Bo Zhang ◽  
Hong Zhang
Keyword(s):  
Symmetry Breaking ◽  
Long Range ◽  
Three Dimensional ◽  
Dipolar Interaction ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Symmetry Properties ◽  
Tunneling Dynamics ◽  
Bose Einstein ◽  
Double Well Potential

We investigate the properties of a three-dimensional (3D) dipolar Bose–Einstein condensate (BEC) in a double-well potential (DWP). Symmetry breaking and tunneling dynamics phenomena are demonstrated for 164Dy atoms in the 3D DWP using an effective two-mode model. The results show that the symmetry properties of the dynamics are affected markedly by the long-range nature and anisotropy of the dipolar interaction and the isotropic contact interaction.

scholarly journals Spontaneous symmetry breaking in persistent currents of spinor polaritons

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Evgeny Sedov ◽  
Sergey Arakelian ◽  
Alexey Kavokin
Keyword(s):  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Degrees Of Freedom ◽  
Continuous Wave ◽  
Rotational Symmetry ◽  
Einstein Condensate ◽  
Persistent Currents ◽  
Optical Pump ◽  
Bose Einstein Condensate ◽  
Bose Einstein

AbstractWe predict the spontaneous symmetry breaking in a spinor Bose–Einstein condensate of exciton-polaritons (polaritons) caused by the coupling of its spin and orbital degrees of freedom. We study a polariton condensate trapped in a ring-shaped effective potential with a broken rotational symmetry. We propose a realistic scheme of generating controllable spinor azimuthal persistent currents of polaritons in the trap under the continuous wave optical pump. We propose a new type of half-quantum circulating states in a spinor system characterized by azimuthal currents in both circular polarizations and a vortex in only one of the polarizations. The spontaneous symmetry breaking in the spinor polariton condensate that consists in the switching from co-winding to opposite-winding currents in opposite spin states is revealed. It is characterized by the change of the average orbital angular momentum of the condensate from zero to non-zero values. The radial displacement of the pump spot and the polarization of the pump act as the control parameters. The considered system exhibits a fundamental similarity to a superconducting flux qubit, which makes it highly promising for applications in quantum computing.

Antisymmetry breaking of discrete dipole gap solitons induced by a phase-slip defect

2014 ◽  
Vol 28 (12) ◽  
pp. 1450097 ◽  
Author(s):  
Xiangyu Zhang ◽  
Jinglei Chai ◽  
Dezhao Ou ◽  
Yongyao Li
Keyword(s):  
Symmetry Breaking ◽  
Optical Lattice ◽  
Einstein Condensate ◽  
Phase Slip ◽  
One Dimensional ◽  
Waveguide Arrays ◽  
Bose Einstein Condensate ◽  
First Excited State ◽  
Bose Einstein ◽  
Dipole Soliton

In this paper, we study the antisymmetry breaking of discrete dipole soliton induced by a phase-slip one-dimensional discrete lattice, which contains on-site self-repulsive nonlinearity. This system can be realized in waveguide arrays system in optics or Bose–Einstein condensate in optical lattice. Different from the symmetry breaking occurring in the ground-state, antisymmetry breaking occurs in the first excited state, which contains antisymmetry. For this system, stable antisymmetric dipole soliton and anti-asymmetric are found, the symmetry transition between them is supercritical type. It is found that, increasing the total norm of the soliton or decreasing the coupled strength of the defect waveguide can lead to the antisymmetry breaking. Such kind of symmetry breaking can lead to the change of the tendency of some characters of the soliton.

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