日時
2024年10月8日(火)16:00 - 17:30 (JST)
講演者
  • 鈴木 史花 (CNLS Postdoctoral Research Associate, T4 / Center for Nonlinear Studies, Los Alamos National Laboratory, USA)
言語
英語
ホスト
Tetsuo Hatsuda

Phase transitions are typically classified as either first-order or second-order. The formation of topological defects in second-order phase transitions is well described by the Kibble-Zurek mechanism, while nucleation theory addresses first-order phase transitions. However, certain systems, such as superconductors and liquid crystals, can exhibit “weakly first-order” phase transitions that do not fit into these established frameworks. In this presentation, I introduce a new theoretical approach that combines the Kibble-Zurek mechanism with nucleation theory to explain topological defect formation in weakly first-order phase transitions. Additionally, I will discuss nonlinear quantum phase transitions that exhibit behaviors similar to weakly first-order transitions, which can be related to experiments with ultra-cold Rydberg atoms.

References

  1. Fumika Suzuki and Wojciech H. Zurek, Topological Defect Formation in a Phase Transition with Tunable Order, Phys. Rev. Lett. 132, 241601 (2024), doi: 10.1103/PhysRevLett.132.241601
  2. Nikolai A. Sinitsyn, Vijay Ganesh Sadhasivam, Fumika Suzuki, Nonadiabatic transitions during a passage near a critical point, J. Chem. Phys. 160, 074104 (2024), doi: 10.1063/5.0191933
  3. Vijay Ganesh Sadhasivam, Fumika Suzuki, Bin Yan, Nikolai A. Sinitsyn, Parametric tuning of dynamical phase transitions in ultracold reactions, arXiv: 2403.09291
  4. Bhavay Tyagi, Fumika Suzuki, Vladimir A. Chernyak, Nikolai A. Sinitsyn, Asymmetry Amplification by a Nonadiabatic Passage through a Critical Point, arXiv: 2408.15897

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