Abstract

The Dynamics Of Dark-Bright (DB) Solitons Beyond The Mean-Field Approximation Is Investigated. We First Examine The Case Of A Single DB Soliton And Its Oscillations Within A Parabolic Trap. Subsequently, We Move To The Setting Of Collisions, Comparing The Mean-Field Approximation To That Involving Multiple Orbitals In Both The Dark And The Bright Component. Fragmentation Is Present And Significantly Affects The Dynamics, Especially In The Case Of Slower Solitons And In That Of Lower Atom Numbers. It Is Shown That The Presence Of Fragmentation Allows For Bipartite Entanglement Between The Distinguishable Species. Most Importantly The Interplay Between Fragmentation And Entanglement Leads To The Splitting Of Each Of The Parent Mean-Field DB Solitons, Placed Off-Center Within The Parabolic Trap, Into A Fast And A Slow Daughter Solitary Wave. The Latter Process Is In Direct Contrast To The Predictions Of The Mean-Field Approximation. A Variety Of Excitations Including DB Solitons In Multiple (Concurrently Populated) Orbitals Is Observed. Dark-Antidark States And Domain-Wall-Bright Soliton Complexes Can Also Be Observed To Arise Spontaneously In The Beyond Mean-Field Dynamics.

Department(s)

Physics

Publication Status

Open Access

Comments

Seventh Framework Programme, Grant 605096

Keywords and Phrases

beyond mean field dynamics; bosonic mixtures; dark-bright solitons; entanglement; fragmentation; pattern formation; ultracold bosons

International Standard Serial Number (ISSN)

1367-2630

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2024 The Authors, All rights reserved.

Creative Commons Licensing

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

Publication Date

01 Jul 2017

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