Evidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions

Blurring the boundary between bosons and fermions lies at the heart of a wide range of intriguing quantum phenomena in multiple disciplines, ranging from condensed matter physics and atomic, molecular, and optical physics to high-energy physics. One such example is a multicomponent Fermi gas with SU...

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Autores principales:	Bo Song, Yangqian Yan, Chengdong He, Zejian Ren, Qi Zhou, Gyu-Boong Jo
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2020
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/1f3d2a686cc046dea465f1679700f4e8
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spelling	oai:doaj.org-article:1f3d2a686cc046dea465f1679700f4e82021-12-02T13:27:32ZEvidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions10.1103/PhysRevX.10.0410532160-3308https://doaj.org/article/1f3d2a686cc046dea465f1679700f4e82020-12-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.10.041053http://doi.org/10.1103/PhysRevX.10.041053https://doaj.org/toc/2160-3308Blurring the boundary between bosons and fermions lies at the heart of a wide range of intriguing quantum phenomena in multiple disciplines, ranging from condensed matter physics and atomic, molecular, and optical physics to high-energy physics. One such example is a multicomponent Fermi gas with SU(N) symmetry that is expected to behave like spinless bosons in the large-N limit, where the large number of internal states weakens constraints from the Pauli exclusion principle. However, bosonization in SU(N) fermions has never been established in high dimensions where exact solutions are absent. Here, we report direct evidence for bosonization in a SU(N) fermionic ytterbium gas with tunable N in three dimensions (3D). We measure contacts, the central quantity controlling dilute quantum gases, from the momentum distribution and find that the contact per spin approaches a constant with a 1/N scaling in the low-fugacity regime consistent with our theoretical prediction. This scaling signifies the vanishing role of the fermionic statistics in thermodynamics and allows us to verify bosonization through measuring a single physical quantity. Our work delivers a highly controllable quantum simulator to exchange the bosonic and fermionic statistics through tuning the internal degrees of freedom in any generic dimensions. It also suggests a new route toward exploring multicomponent quantum systems and their underlying symmetries with contacts.Bo SongYangqian YanChengdong HeZejian RenQi ZhouGyu-Boong JoAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 10, Iss 4, p 041053 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Bo Song Yangqian Yan Chengdong He Zejian Ren Qi Zhou Gyu-Boong Jo Evidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions
description	Blurring the boundary between bosons and fermions lies at the heart of a wide range of intriguing quantum phenomena in multiple disciplines, ranging from condensed matter physics and atomic, molecular, and optical physics to high-energy physics. One such example is a multicomponent Fermi gas with SU(N) symmetry that is expected to behave like spinless bosons in the large-N limit, where the large number of internal states weakens constraints from the Pauli exclusion principle. However, bosonization in SU(N) fermions has never been established in high dimensions where exact solutions are absent. Here, we report direct evidence for bosonization in a SU(N) fermionic ytterbium gas with tunable N in three dimensions (3D). We measure contacts, the central quantity controlling dilute quantum gases, from the momentum distribution and find that the contact per spin approaches a constant with a 1/N scaling in the low-fugacity regime consistent with our theoretical prediction. This scaling signifies the vanishing role of the fermionic statistics in thermodynamics and allows us to verify bosonization through measuring a single physical quantity. Our work delivers a highly controllable quantum simulator to exchange the bosonic and fermionic statistics through tuning the internal degrees of freedom in any generic dimensions. It also suggests a new route toward exploring multicomponent quantum systems and their underlying symmetries with contacts.
format	article
author	Bo Song Yangqian Yan Chengdong He Zejian Ren Qi Zhou Gyu-Boong Jo
author_facet	Bo Song Yangqian Yan Chengdong He Zejian Ren Qi Zhou Gyu-Boong Jo
author_sort	Bo Song
title	Evidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions
title_short	Evidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions
title_full	Evidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions
title_fullStr	Evidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions
title_full_unstemmed	Evidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions
title_sort	evidence for bosonization in a three-dimensional gas of su(n) fermions
publisher	American Physical Society
publishDate	2020
url	https://doaj.org/article/1f3d2a686cc046dea465f1679700f4e8
work_keys_str_mv	AT bosong evidenceforbosonizationinathreedimensionalgasofsunfermions AT yangqianyan evidenceforbosonizationinathreedimensionalgasofsunfermions AT chengdonghe evidenceforbosonizationinathreedimensionalgasofsunfermions AT zejianren evidenceforbosonizationinathreedimensionalgasofsunfermions AT qizhou evidenceforbosonizationinathreedimensionalgasofsunfermions AT gyuboongjo evidenceforbosonizationinathreedimensionalgasofsunfermions
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Evidence for Bosonization in a Three-Dimensional Gas of SU(N) Fermions

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