Birotons and “Dark” Quantum Hall Hierarchies

A computational scheme is suggested to estimate neutral excitation energies in the fractional quantum Hall effect (FQHE) states. The FQHE states are systematized according to the Farey-number hierarchy structure. We show that besides the widely known Laughlin–Jain hierarchy of fractional states, the...

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Published in:Applied sciences 2022-08, Vol.12 (15), p.7940
Main Authors: Grigorev, Oleg A., Musina, Liliya I., Van’kov, Alexander B., Volkov, Oleg V., Kulik, Leonid V.
Format: Article
Language:English
Subjects:
Coexistence
Computer applications
Energy
exact diagonalization
Excitation
Farey series
fractional quantum Hall effect
Hierarchies
Quantum Hall effect
Schrodinger equation
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Musina, Liliya I.
Van’kov, Alexander B.
Volkov, Oleg V.
Kulik, Leonid V.
description A computational scheme is suggested to estimate neutral excitation energies in the fractional quantum Hall effect (FQHE) states. The FQHE states are systematized according to the Farey-number hierarchy structure. We show that besides the widely known Laughlin–Jain hierarchy of fractional states, there exist other “dark” hierarchies. Although hardly observed in the highest mobility samples, they can significantly affect the thermodynamics and spectral characteristics of the FQHE states. The known problems in the interpretation of the FQHE’s experimental results are explained in terms of the coexistence of two fundamentally different transformations of the electron system, one of which is a neutral excitation in the FQHE state, whereas the other is a transition between two FQHE ground states, one of which represents the Laughlin–Jain FQHE hierarchy and the other a state of “dark” hierarchies.
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subjects Coexistence
Computer applications
Energy
exact diagonalization
Excitation
Farey series
fractional quantum Hall effect
Hierarchies
Quantum Hall effect
Schrodinger equation
title Birotons and “Dark” Quantum Hall Hierarchies
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