Abstract
The Many-Body Dissipative Flow Induced By A Mobile Gaussian Impurity Harmonically Oscillating Within A Cigar-Shaped Bose-Einstein Condensate Is Investigated. For Very Small And Large Driving Frequencies The Superfluid Phase Is Preserved. Dissipation Is Identified, For Intermediate Driving Frequencies, By The Nonzero Value Of The Drag Force Whose Abrupt Increase Signals The Spontaneous Downstream Emission Of An Array Of Gray Solitons. After Each Emission Event, Typically Each Of The Solitary Waves Formed Decays And Splits Into Two Daughter Gray Solitary Waves That Are Found To Be Robust Propagating In The Bosonic Background For Large Evolution Times. In Particular, A Smooth Transition Toward Dissipation Is Observed, With The Critical Velocity For Solitary Wave Formation Depending On Both The Characteristics Of The Obstacle, Namely Its Driving Frequency And Width As Well As On The Interaction Strength. The Variance Of A Sample Of Single-Shot Simulations Indicates The Fragmented Nature Of The System; Here It Is Found To Increase During Evolution For Driving Frequencies Where The Coherent Structure Formation Becomes Significant. Finally,we Demonstrate That For Fairly Large Particle Numbers In Situ Single-Shot Images Directly Capture The Gray Soliton's Decay And Splitting.
Recommended Citation
G. C. Katsimiga et al., "Many-Body Dissipative Flow Of A Confined Scalar Bose-Einstein Condensate Driven By A Gaussian Impurity," Physical Review A, vol. 98, no. 1, article no. 013632, American Physical Society, Jan 2018.
The definitive version is available at https://doi.org/10.1103/PhysRevA.98.013632
Department(s)
Physics
International Standard Serial Number (ISSN)
2469-9934; 2469-9926
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 American Physical Society, All rights reserved.
Publication Date
01 Jan 2018
Comments
Alexander von Humboldt-Stiftung, Grant None