scholarly journals Back-action evading measurement of the collective mode of a Bose–Einstein condensate

2020 ◽  
Vol 37 (5) ◽  
pp. 1263 ◽  
Author(s):  
Marjan Fani ◽  
Ali Dalafi
Keyword(s):  
Collective Mode ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Back Action ◽  
Bose Einstein

scholarly journals Anharmonicity-induced criticality of collective excitation in a trapped Bose–Einstein condensate

2018 ◽  
Vol 32 (31) ◽  
pp. 1850345
Author(s):  
Qun Wang ◽  
Bo Xiong
Keyword(s):  
Collective Mode ◽  
Collective Excitation ◽  
Einstein Condensate ◽  
Low Energy ◽  
Many Body ◽  
Bose Einstein Condensate ◽  
Large Numbers ◽  
Many Body Systems ◽  
Repulsive Forces ◽  
Bose Einstein

We investigate the low-energy excitations of a dilute atomic Bose gas confined in a anharmonic trap interacting with repulsive forces. The dispersion law of both surface and compression modes is derived and analyzed for large numbers of atoms in the trap, which show two branches of excitation and appear two critical values, where one of them indicates collective excitation which would be unstable dynamically, and the other one indicates the existing collective mode with lower frequency under anharmonic influence than that in harmonic trapping case. Our work reveals the key role played by the anharmonicity and interatomic forces which introduce a rich structure in the dynamic behavior of these new many-body systems.

scholarly journals Stabilizing an attractive Bose-Einstein condensate by driving a surface collective mode

2001 ◽  
Vol 63 (3) ◽  
Author(s):  
Arjendu K. Pattanayak ◽  
Arnaldo Gammal ◽  
Charles A. Sackett ◽  
Randall G. Hulet
Keyword(s):  
Collective Mode ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein
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