scholarly journals Superfluidity of Bose—Einstein condensates in ultracold atomic gases

2015 ◽  
Vol 24 (5) ◽  
pp. 050507 ◽  
Author(s):  
Qi-Zhong Zhu ◽  
Biao Wu
Keyword(s):  
Atomic Gases ◽  
Ultracold Atomic Gases ◽  
Bose Einstein

Bose–Einstein condensation of ultracold atomic gases

1996 ◽  
Vol T66 ◽  
pp. 31-37 ◽  
Author(s):  
W Ketterle ◽  
M R Andrews ◽  
K B Davis ◽  
D S Durfee ◽  
D M Kurn ◽  
...  
Keyword(s):  
Einstein Condensation ◽  
Atomic Gases ◽  
Ultracold Atomic Gases ◽  
Bose Einstein Condensation ◽  
Bose Einstein

scholarly journals Characteristic temperatures of a triplon system of dimerized quantum magnets

2020 ◽  
pp. 2150018
Author(s):  
Abdulla Rakhimov ◽  
Mukhtorali Nishonov ◽  
Luxmi Rani ◽  
Bilal Tanatar
Keyword(s):  
Three Dimensional ◽  
Einstein Condensation ◽  
Atomic Gases ◽  
Quantum Magnets ◽  
Ultracold Atomic Gases ◽  
Bose Einstein Condensation ◽  
Characteristic Temperatures ◽  
Inversion Temperature ◽  
Bose Einstein ◽  
Thomson Coefficient

Exploiting the analogy between ultracold atomic gases and the system of triplons, we study magneto-thermodynamic properties of dimerized quantum magnets in the framework of Bose–Einstein condensation (BEC). Particularly, introducing the inversion (or Joule–Thomson) temperature [Formula: see text] as the point where Joule–Thomson coefficient of an isenthalpic process changes its sign, we show that for a simple paramagnet, this temperature is infinite, while for three-dimensional (3D) dimerized quantum magnets it is finite and always larger than the critical temperature [Formula: see text] of BEC. Below the inversion temperature [Formula: see text], the system of triplons may be in a liquid phase, which undergoes a transition into a superfluid phase at [Formula: see text]. The dependence of the inversion temperature on the external magnetic field [Formula: see text] has been calculated for quantum magnets of TlCuCl3 and Sr3Cr2O8.

scholarly journals Dissipative Magnetic Soliton in a Spinor Polariton Bose–Einstein Condensate

2021 ◽  
Vol 9 ◽  
Author(s):  
Chunyu Jia ◽  
Rukuan Wu ◽  
Ying Hu ◽  
Wu-Ming Liu ◽  
Zhaoxin Liang
Keyword(s):  
Einstein Condensate ◽  
Spin Excitation ◽  
Atomic Gases ◽  
Total Density ◽  
Ultracold Atomic Gases ◽  
Bose Einstein Condensate ◽  
Spin Polarized ◽  
Linearly Polarized ◽  
Topological Excitation ◽  
Bose Einstein

Magnetic soliton is an intriguing nonlinear topological excitation that carries magnetic charges while featuring a constant total density. So far, it has only been studied in the ultracold atomic gases with the framework of the equilibrium physics, where its stable existence crucially relies on a nearly spin-isotropic, antiferromagnetic, interaction. Here, we demonstrate that magnetic soliton can appear as the exact solutions of dissipative Gross–Pitaevskii equations in a linearly polarized spinor polariton condensate with the framework of the non-equilibrium physics, even though polariton interactions are strongly spin anisotropic. This is possibly due to a dissipation-enabled mechanism, where spin excitation decouples from other excitation channels as a result of gain-and-loss balance. Such unconventional magnetic soliton transcends constraints of equilibrium counterpart and provides a novel kind of spin-polarized polariton soliton for potential application in opto-spintronics.

scholarly journals Disordered ultracold atomic gases in optical lattices: A case study of Fermi-Bose mixtures

2005 ◽  
Vol 72 (6) ◽  
Author(s):  
V. Ahufinger ◽  
L. Sanchez-Palencia ◽  
A. Kantian ◽  
A. Sanpera ◽  
M. Lewenstein
Keyword(s):  
Optical Lattices ◽  
Atomic Gases ◽  
Ultracold Atomic Gases
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