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Title: Quantum Hall Phases of two-component bosons
Author: Grass, Tobias
Raventós, D.
Lewenstein, M.
Juliá-Díaz, Bruno
Keywords: Efecte Hall quàntic
Matèria condensada
Quantum Hall effect
Condensed matter
Issue Date: 13-Jan-2014
Publisher: American Physical Society
Abstract: The recent production of synthetic magnetic fields acting on electroneutral particles, such as atoms or photons, has boosted interest in the quantum Hall physics of bosons. Adding pseudospin 1/2 to the bosons greatly enriches the scenario, as it allows them to form an interacting integer quantum Hall (IQH) phase with no fermionic counterpart. Here we show that, for a small two-component Bose gas on a disk, the complete strongly correlated regime, extending from the integer phase at filling factor ν = 2 to the Halperin phase at filling factor ν = 2 / 3, is well described by composite fermionization of the bosons. Moreover we study the edge excitations of the IQH state, which, in agreement with expectations from topological field theory, are found to consist of forward-moving charge excitations and backward-moving spin excitations. Finally, we demonstrate how pair-correlation functions allow one to experimentally distinguish the IQH state from competing states, such as non-Abelian spin singlet (NASS) states.
Note: Reproducció del document publicat a:
It is part of: Physical Review B, 2014, vol. 89, p. 045114-1-045114-7
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ISSN: 1098-0121
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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