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Repulsive Fermi polarons in a resonant mixture of ultracold 6Li atoms
dc.contributor.author | Scazza, F |
dc.contributor.author | Valtolina, G |
dc.contributor.author | Massignan, Pietro Alberto |
dc.contributor.author | Recati, Alessio |
dc.contributor.author | Amico, A |
dc.contributor.author | Burchianti, A |
dc.contributor.author | Fort, C |
dc.contributor.author | Inguscio, M |
dc.contributor.author | Zaccanti, M |
dc.contributor.author | Roati, G |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física |
dc.date.accessioned | 2018-04-06T13:34:19Z |
dc.date.available | 2018-04-06T13:34:19Z |
dc.date.issued | 2017 |
dc.identifier.citation | Scazza, 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.issn | 0031-9007 |
dc.identifier.uri | http://hdl.handle.net/2117/116043 |
dc.description.abstract | We 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.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica |
dc.subject.lcsh | Thermodynamics |
dc.subject.lcsh | Quantum theory |
dc.subject.other | Fermi gases |
dc.subject.other | polarons |
dc.subject.other | Physical Systems |
dc.subject.other | Ultracold gases |
dc.subject.other | resonance Spectroscopy |
dc.subject.other | Condensed Matter & Materials PhysicsAtomic |
dc.subject.other | Molecular & Optical |
dc.title | Repulsive Fermi polarons in a resonant mixture of ultracold 6Li atoms |
dc.type | Article |
dc.subject.lemac | Termodinàmica |
dc.subject.lemac | Quàntums, Teoria dels |
dc.contributor.group | Universitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity |
dc.identifier.doi | 10.1103/PhysRevLett.118.083602 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://link.aps.org/doi/10.1103/PhysRevLett.118.083602 |
dc.rights.access | Open Access |
local.identifier.drac | 21902630 |
dc.description.version | Postprint (author's final draft) |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/H2020/637738/EU/Superfluidity and ferromagnetism of unequal mass fermions with two- and three-body resonant interactions/PoLiChroM |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/H2020/705269/EU/Strongly correlated ultracold fermions in two-dimensional tailored optical potentials: pairing, superfluidity and disorder/SCOUTFermi2D |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/FP7/307032/EU/Quantum simulation of two-dimensional fermionic systems/QUFERM2D |
local.citation.author | Scazza, F.; Valtolina, G.; Massignan, P.; Recati, A.; Amico, A.; Burchianti, A.; Fort, C.; Inguscio, M.; Zaccanti, M.; Roati, G. |
local.citation.publicationName | Physical review letters |
local.citation.volume | 118 |
local.citation.startingPage | 083602 |
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