Quench Dynamics of Collective Modes in Fractional Quantum Hall Bilayers.

Liu, Zhao; Balram, Ajit C; Papic, Zlatko; Gromov, Andrey

Liu, Zhao; Balram, Ajit C; Papic, Zlatko; Gromov, Andrey.

Afiliación

Liu Z; Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou 310027, China.
Balram AC; Institute of Mathematical Sciences, HBNI, CIT Campus, Chennai 600113, India.
Papic Z; School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom.
Gromov A; Brown Theoretical Physics Center and Department of Physics, Brown University, 182 Hope Street, Providence, Rhode Island 02912, USA.

Phys Rev Lett ; 126(7): 076604, 2021 Feb 19.

Article en En | MEDLINE | ID: mdl-33666472

RESUMEN

We introduce different types of quenches to probe the nonequilibrium dynamics and multiple collective modes of bilayer fractional quantum Hall states. We show that applying an electric field in one layer induces oscillations of a spin-1 degree of freedom, whose frequency matches the long-wavelength limit of the dipole mode. On the other hand, oscillations of the long-wavelength limit of the quadrupole mode, i.e., the spin-2 graviton, as well as the combination of two spin-1 states, can be activated by a sudden change of band mass anisotropy. We construct an effective field theory to describe the quench dynamics of these collective modes. In particular, we derive the dynamics for both the spin-2 and the spin-1 states and demonstrate their excellent agreement with numerics.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos

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