2025-10-08 バッファロー大学
A new method developed by University at Buffalo physicists will allow qunatum dnyamics, like the interaction between two atoms, to be simulated more easily on consumer laptops.
＜関連情報＞
- https://www.buffalo.edu/news/releases/2025/10/quantum-dynamics-on-your-laptop.html
- https://journals.aps.org/prxquantum/abstract/10.1103/1wwv-k7hg
散逸スピンダイナミクスのためのユーザーフレンドリーな切断ウィグナー近似 User-Friendly Truncated Wigner Approximation for Dissipative Spin Dynamics
Hossein Hosseinabadi, Oksana Chelpanova, and Jamir Marino
PRX Quantum Published: 8 September, 2025
DOI: https://doi.org/10.1103/1wwv-k7hg
Abstract
We put forward a user-friendly framework of the truncated Wigner approximation (TWA) for dissipative quantum many-body systems. Our approach is computationally affordable and it features a straightforward implementation. The leverage of the method can be ultimately traced to an intimate connection between the TWA and the semiclassical limit of the quantum Langevin equation, which we unveil by resorting to a path-integral representation of the Lindbladian. Our approach allows us to explore dynamics from early to late times in a variety of models at the core of modern atomic, molecular, and optical research, including lasing, central-spin models, driven arrays of Rydbergs, and correlated emission in free space. Notably, our TWA approach outperforms the cumulant-expansion method in certain models and performs comparably well in others, all while offering significantly lower computational costs and a much simpler formulation of the dynamical equations. We therefore argue that TWA could, in the near future, become a primary tool for a fast and efficient first exploration of driven-dissipative many-body dynamics on consumer-grade computers.
