Speaker
Description
See the full abstract here http://ocs.ciemat.es/EPS2019ABS/pdf/I4.J601.pdf
Inhomogeneous drift-wave turbulence with zonal flows (ZFs) can be modeled as effective quantum plasma where the ZF velocity serves as a collective field [1, 2]. This effective plasma can be described, quite intuitively, by a Wigner-Moyal kinetic equation (WMKE), which was originally introduced as phase-space description of quantum mechanics [3]. We report the first explicit application of the Wigner-Moyal formalism to analytic and numerical modeling of ZF physics [4, 5] within the generalized Hasegawa-Mima model. The corresponding WMKE is more delicate and rich in physics than that for optical turbulence, to which a similar approach was applied in the past. The WMKE is also an improvement to the traditional wave kinetic equation for DW turbulence in that it contains "full-wave" effects, i.e., those associated with the finite ratio of the ZF scales to the drift-wave wavelengths. The full-wave effects are found to be essential and can qualitatively alter the formation and stability of ZFs [4, 5, 6]. The quantumlike approach elucidates the nonlinear saturation and oscillatory dynamics of collisionless ZFs [7] and also the physics of propagating coherent structures [8], which can be viewed as drifton condensates (Fig. 1). A systematic procedure for extending the quantumlike Wigner–Moyal formulations tomore general turbulent systems is also proposed.
References
[1] D. E. Ruiz, J. B. Parker, E. L. Shi, and I. Y. Dodin, Phys. Plasmas 23, 122304 (2016).
[2] D. E. Ruiz, M. E. Glinsky, and I. Y. Dodin, J. Plasma Phys. 85, 905850101 (2019).
[3] J. E. Moyal, Math. Proc. Cambridge Philos. Soc. 45, 99 (1949).
[4] H. Zhu, Y. Zhou, D. E. Ruiz, and I. Y. Dodin, Phys. Rev. E 97, 053210 (2018).
[5] H. Zhu, Y. Zhou, and I. Y. Dodin, Phys. Plasmas 25, 072121 (2018).
[6] H. Zhu, Y. Zhou, and I. Y. Dodin, Phys. Plasmas 25, 082121 (2018).
[7] H. Zhu, Y. Zhou, and I. Y. Dodin, arXiv:1902.04970
[8] Y. Zhou, H. Zhu, and I. Y. Dodin, arXiv:1902.06870.
