Suppressing Dissipation in a Floquet-Hubbard System

The concept of “Floquet engineering” relies on an external periodic drive to realize novel, effectively static Hamiltonians. This technique is being explored in experimental platforms across physics, including ultracold atoms, laser-driven electron systems, nuclear magnetic resonance, and trapped io...

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Autores principales:	Konrad Viebahn, Joaquín Minguzzi, Kilian Sandholzer, Anne-Sophie Walter, Manish Sajnani, Frederik Görg, Tilman Esslinger
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/cc571f02dd0a40f3bb32825b79dcd479
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spelling	oai:doaj.org-article:cc571f02dd0a40f3bb32825b79dcd4792021-12-02T11:40:33ZSuppressing Dissipation in a Floquet-Hubbard System10.1103/PhysRevX.11.0110572160-3308https://doaj.org/article/cc571f02dd0a40f3bb32825b79dcd4792021-03-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.011057http://doi.org/10.1103/PhysRevX.11.011057https://doaj.org/toc/2160-3308The concept of “Floquet engineering” relies on an external periodic drive to realize novel, effectively static Hamiltonians. This technique is being explored in experimental platforms across physics, including ultracold atoms, laser-driven electron systems, nuclear magnetic resonance, and trapped ions. The key challenge in Floquet engineering is to avoid the uncontrolled absorption of photons from the drive, especially in interacting systems in which the excitation spectrum becomes effectively dense. The resulting dissipative coupling to higher-lying modes, such as the excited bands of an optical lattice, has been explored in recent experimental and theoretical works, but the demonstration of a broadly applicable method to mitigate this effect is lacking. Here, we show how two-path quantum interference applied to strongly correlated fermions in a driven optical lattice suppresses dissipative coupling to higher bands and increases the lifetime of double occupancies and spin correlations by 2 to 3 orders of magnitude. Interference is achieved by introducing a weak second modulation at twice the fundamental driving frequency with a definite relative phase. This technique is shown to suppress dissipation in both weakly and strongly interacting regimes of an off-resonantly driven Hubbard system, opening an avenue to realizing low-temperature phases of matter in interacting Floquet systems.Konrad ViebahnJoaquín MinguzziKilian SandholzerAnne-Sophie WalterManish SajnaniFrederik GörgTilman EsslingerAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 1, p 011057 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Konrad Viebahn Joaquín Minguzzi Kilian Sandholzer Anne-Sophie Walter Manish Sajnani Frederik Görg Tilman Esslinger Suppressing Dissipation in a Floquet-Hubbard System
description	The concept of “Floquet engineering” relies on an external periodic drive to realize novel, effectively static Hamiltonians. This technique is being explored in experimental platforms across physics, including ultracold atoms, laser-driven electron systems, nuclear magnetic resonance, and trapped ions. The key challenge in Floquet engineering is to avoid the uncontrolled absorption of photons from the drive, especially in interacting systems in which the excitation spectrum becomes effectively dense. The resulting dissipative coupling to higher-lying modes, such as the excited bands of an optical lattice, has been explored in recent experimental and theoretical works, but the demonstration of a broadly applicable method to mitigate this effect is lacking. Here, we show how two-path quantum interference applied to strongly correlated fermions in a driven optical lattice suppresses dissipative coupling to higher bands and increases the lifetime of double occupancies and spin correlations by 2 to 3 orders of magnitude. Interference is achieved by introducing a weak second modulation at twice the fundamental driving frequency with a definite relative phase. This technique is shown to suppress dissipation in both weakly and strongly interacting regimes of an off-resonantly driven Hubbard system, opening an avenue to realizing low-temperature phases of matter in interacting Floquet systems.
format	article
author	Konrad Viebahn Joaquín Minguzzi Kilian Sandholzer Anne-Sophie Walter Manish Sajnani Frederik Görg Tilman Esslinger
author_facet	Konrad Viebahn Joaquín Minguzzi Kilian Sandholzer Anne-Sophie Walter Manish Sajnani Frederik Görg Tilman Esslinger
author_sort	Konrad Viebahn
title	Suppressing Dissipation in a Floquet-Hubbard System
title_short	Suppressing Dissipation in a Floquet-Hubbard System
title_full	Suppressing Dissipation in a Floquet-Hubbard System
title_fullStr	Suppressing Dissipation in a Floquet-Hubbard System
title_full_unstemmed	Suppressing Dissipation in a Floquet-Hubbard System
title_sort	suppressing dissipation in a floquet-hubbard system
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/cc571f02dd0a40f3bb32825b79dcd479
work_keys_str_mv	AT konradviebahn suppressingdissipationinafloquethubbardsystem AT joaquinminguzzi suppressingdissipationinafloquethubbardsystem AT kiliansandholzer suppressingdissipationinafloquethubbardsystem AT annesophiewalter suppressingdissipationinafloquethubbardsystem AT manishsajnani suppressingdissipationinafloquethubbardsystem AT frederikgorg suppressingdissipationinafloquethubbardsystem AT tilmanesslinger suppressingdissipationinafloquethubbardsystem
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Suppressing Dissipation in a Floquet-Hubbard System

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