2021 Fiscal Year Annual Research Report
Quantum thermodynamics of interacting systems
| Project/Area Number |
21J10521
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| Research Institution | Okinawa Institute of Science and Technology Graduate University |
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Principal Investigator |
Keller Tim 沖縄科学技術大学院大学, 科学技術研究科, 特別研究員(DC2)
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| Project Period (FY) |
2021-04-28 – 2023-03-31
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| Keywords | Ultracold gases / Strongly correlated / One-dimensional mixture / Quantum phase transition / Critical metrology / Bose-Einstein condensate |
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| Outline of Annual Research Achievements |
I described a novel self-pinning transition for a quasi-one-dimensional quantum gas in the strongly correlated Tonks-Girardeau (TG) limit which is immersed into a Bose-Einstein condensate (BEC) in collaboration with Dr. Thomas Fogarty and Prof. Thomas Busch and developed an effective model to accurately describe it.
Our paper about this transition was accepted in the prestigious journal Physical Review Letters and published as an ‘Editor’s Suggestion’ on January 31, 2022.
On July 1, the article `Adiabatic critical quantum metrology cannot reach the Heisenberg limit even when shortcuts to adiabaticity are applied' for which I derived several shortcuts to adiabaticity in collaboration with Dr. Karol Gietka, Friederike Metz, and Dr. Jing Li was published in the journal Quantum.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The discovery of the novel self-pinning transition and the simple effective model that can accurately describe the system even at finite temperatures allowed to make fast progress and opened up a new direction for research that can act as a basis for many future projects, particularly for simulating solid-state physics with this system.
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| Strategy for Future Research Activity |
I will study the self-pinning transition away from the TG limit of the immersed component. There, the system exhibits an additional transition between superfluid and insulating state as a function of the finite intra-species interaction.
I have already numerically computed the system’s phase diagram in the case of N=2 and N=3 immersed atoms and expanded the analytical model. A manuscript is nearly completed and will be submitted to SciPost Physics soon.
Furthermore, the matter-wave lattice in the pinned state can support phonon modes in contrast to conventional optical lattice potentials, which is necessary for faithfully simulating solid-state physics. I will study potential applications of this feature.
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Research Products
(5 results)
