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dc.contributor.authorScazza, F
dc.contributor.authorValtolina, G
dc.contributor.authorMassignan, Pietro Alberto
dc.contributor.authorRecati, Alessio
dc.contributor.authorAmico, A
dc.contributor.authorBurchianti, A
dc.contributor.authorFort, C
dc.contributor.authorInguscio, M
dc.contributor.authorZaccanti, M
dc.contributor.authorRoati, G
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2018-04-06T13:34:19Z
dc.date.available2018-04-06T13:34:19Z
dc.date.issued2017
dc.identifier.citationScazza, F., Valtolina, G., Massignan, P., Recati, A., Amico, A., Burchianti, A., Fort, C., Inguscio, M., Zaccanti, M., Roati, G. Repulsive Fermi polarons in a resonant mixture of ultracold 6Li atoms. "Physical review letters", 2017, vol. 118.
dc.identifier.issn0031-9007
dc.identifier.urihttp://hdl.handle.net/2117/116043
dc.description.abstractWe employ radio-frequency spectroscopy to investigate a polarized spin mixture of ultracold 6 Li atoms close to a broad Feshbach scattering resonance. Focusing on the regime of strong repulsive interactions, we observe well-defined coherent quasiparticles even for unitarity-limited interactions. We characterize the many-body system by extracting the key properties of repulsive Fermi polarons: the energy E + , the effective mass m * , the residue Z , and the decay rate G . Above a critical interaction, E + is found to exceed the Fermi energy of the bath, while m * diverges and even turns negative, thereby indicating that the repulsive Fermi liquid state becomes energetically and thermodynamically unstable.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica
dc.subject.lcshThermodynamics
dc.subject.lcshQuantum theory
dc.subject.otherFermi gases
dc.subject.otherpolarons
dc.subject.otherPhysical Systems
dc.subject.otherUltracold gases
dc.subject.otherresonance Spectroscopy
dc.subject.otherCondensed Matter & Materials PhysicsAtomic
dc.subject.otherMolecular & Optical
dc.titleRepulsive Fermi polarons in a resonant mixture of ultracold 6Li atoms
dc.typeArticle
dc.subject.lemacTermodinàmica
dc.subject.lemacQuàntums, Teoria dels
dc.contributor.groupUniversitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity
dc.identifier.doi10.1103/PhysRevLett.118.083602
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://link.aps.org/doi/10.1103/PhysRevLett.118.083602
dc.rights.accessOpen Access
local.identifier.drac21902630
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/637738/EU/Superfluidity and ferromagnetism of unequal mass fermions with two- and three-body resonant interactions/PoLiChroM
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/705269/EU/Strongly correlated ultracold fermions in two-dimensional tailored optical potentials: pairing, superfluidity and disorder/SCOUTFermi2D
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/307032/EU/Quantum simulation of two-dimensional fermionic systems/QUFERM2D
local.citation.authorScazza, F.; Valtolina, G.; Massignan, P.; Recati, A.; Amico, A.; Burchianti, A.; Fort, C.; Inguscio, M.; Zaccanti, M.; Roati, G.
local.citation.publicationNamePhysical review letters
local.citation.volume118
local.citation.startingPage083602


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Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain