2017 Fiscal Year Annual Research Report
Controllable Superfluid Properties of Dipolar Matter-Wave Bright Solitons
| Project/Area Number |
16F16802
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| Research Institution | Okinawa Institute of Science and Technology Graduate University |
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Principal Investigator |
BUSCH Thomas 沖縄科学技術大学院大学, 量子システム研究ユニット, 教授 (30715272)
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| Co-Investigator(Kenkyū-buntansha) |
EDMONDS MATTHEW 沖縄科学技術大学院大学, 量子システム研究ユニット, 外国人特別研究員
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| Project Period (FY) |
2016-11-07 – 2019-03-31
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| Keywords | Solitons / Ultracold atoms |
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| Outline of Annual Research Achievements |
I have developed a full numerical scheme to simulate the ground states and dynamics of different (Bosonic and Fermionic) impurities trapped by an atomic bright soliton, which acts as an effective matter-wave trap in this context. By exploring the full parameter space of this problem, we have revealed regions where this matter-wave impurity system is stable. By exploring the scattering dynamics of the matter-wave impurity system with a moving 'empty' soliton, regimes of unusual transport where the impurity has a dramatic effect on the solitons dynamics due to it's ability to tunnel back-and-forth between the solitons has been obtained.
Further, the above work has also revealed numerically quasi-stable 'trimers' - bound three-soliton objects which display an unexpected dynamical stability due directly to the presence of a bosonic impurity initially localized in one of the solitons, whose tunneling dynamics between this effective triple well system is attributed the the observed stability of the solitons.
Complimentary to this, I also spent a little time finishing a project related to bright solitons (see point 4 below) with one of my former groups, I acknowledged funding from the JSPS in this publication.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
As well as finishing the above projects, it would be interesting to extend these ideas to other cold atom systems that support solitonic solutions, such as the dipolar system. In this setting, soliton solutions are available in two as well as the traditional one spatial dimension, here one can explore the effect of dimensionality on the interplay of the matter-wave impurity system, and potentially build more complicated objects, such as a Toda lattice.
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| Strategy for Future Research Activity |
As well as finishing the above projects, it would be interesting to extend these ideas to other cold atom systems that support solitonic solutions, such as the dipolar system. In this setting, soliton solutions are available in two as well as the traditional one spatial dimension, here one can explore the effect of dimensionality on the interplay of the matter-wave impurity system, and potentially build more complicated objects, such as a Toda lattice.
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