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PoLiChroM SIGNED

Superfluidity and ferromagnetism of unequal mass fermions with two- and three-body resonant interactions

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EC-Contrib. €

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 PoLiChroM project word cloud

Explore the words cloud of the PoLiChroM project. It provides you a very rough idea of what is the project "PoLiChroM" about.

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Project "PoLiChroM" data sheet

The following table provides information about the project.

Coordinator
CONSIGLIO NAZIONALE DELLE RICERCHE 

Organization address
address: PIAZZALE ALDO MORO 7
city: ROMA
postcode: 185
website: www.cnr.it

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Italy [IT]
 Project website http://quantumgases.lens.unifi.it/exp/crli
 Total cost 1˙495˙000 €
 EC max contribution 1˙495˙000 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-STG
 Funding Scheme ERC-STG
 Starting year 2015
 Duration (year-month-day) from 2015-04-01   to  2020-03-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    CONSIGLIO NAZIONALE DELLE RICERCHE IT (ROMA) coordinator 1˙495˙000.00

Map

 Project objective

Superfluidity and magnetism characterize a wealth of interacting fermion systems encompassing solid-state, nuclear and quark matter environments. From the interplay of these phenomena, the two following issues have been raised: Can superfluid pairing bear a mismatch in the two Fermi surfaces? Can a homogeneous fermion system become ferromagnetic via a zero-ranged interparticle repulsion? Despite decades of interdisciplinary investigations, such questions have not gotten undisputed answers so far. Here, I will experimentally address these problems with a new model system composed of ultracold fermionic Chromium and Lithium atoms with resonant interactions. The two species will mimic electrons of different spins, or quarks of different colours, but exhibiting the high degree of control of an atomic quantum simulator. In particular, two features make this system stand far beyond any other available one: the peculiar Chromium-Lithium mass ratio enables a resonant control of three-body elastic interactions on top of the usual two-body ones, together with an extraordinary suppression of atom recombination into paired states in the regime of strong interspecies repulsion. The first property greatly enhances the observability of elusive polarized superfluid regimes, such as the Fulde-Ferrel-Larkin-Ovchinnikov phase, where pairs condense in nonzero momentum states, and the Sarma or “breached pair” phase, where a homogeneous gapless superfluid coexists with unbound particles. The second makes such mixture a prime platform for the quantum simulation of Stoner’s model for itinerant ferromagnetism, whose study has been denied in nowadays experiments, where pairing instability plagues the formation of sizeable magnetic domains. I will use high-resolution imaging of the system and state-of-the-art spectroscopy schemes for disclosing such exotic phases via a thorough investigation of the phase diagrams of Fermi-Fermi mixtures with attractive or repulsive interactions.

 Publications

year authors and title journal last update
List of publications.
2019 C. Simonelli, E. Neri, A. Ciamei, I. Goti, M. Inguscio, A. Trenkwalder, M. Zaccanti
Realization of a high power optical trapping setup free from thermal lensing effects
published pages: 27215, ISSN: 1094-4087, DOI: 10.1364/oe.27.027215
Optics Express 27/19 2019-11-15
2018 A. Amico, F. Scazza, G. Valtolina, P. E. S. Tavares, W. Ketterle, M. Inguscio, G. Roati, M. Zaccanti
Time-Resolved Observation of Competing Attractive and Repulsive Short-Range Correlations in Strongly Interacting Fermi Gases
published pages: , ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.121.253602
Physical Review Letters 121/25 2019-11-15
2017 G. Valtolina, F. Scazza, A. Amico, A. Burchianti, A. Recati, T. Enss, M. Inguscio, M. Zaccanti, G. Roati
Exploring the ferromagnetic behaviour of a repulsive Fermi gas through spin dynamics
published pages: 704-709, ISSN: 1745-2473, DOI: 10.1038/nphys4108
Nature Physics 13/7 2019-10-10
2017 F. Scazza, G. Valtolina, P. Massignan, A. Recati, A. Amico, A. Burchianti, C. Fort, M. Inguscio, M. Zaccanti, G. Roati
Repulsive Fermi Polarons in a Resonant Mixture of Ultracold Li 6 Atoms
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.118.083602
Physical Review Letters 118/8 2019-10-10

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