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“Imbalanced Superfluid Fermi Gas on a Lieb Lattice" SEMINAR ANNOUNCEMENT

Marek Tylutki Aalto University, Finland

Quan
17/04/2018 de 16:00 a 18:00 (Europe/Madrid / UTC200)
On
UPC campus nord, B4-212 (aula seminari)
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SEMINAR ANNOUNCEMENT

Tuesday, 17th of April 2018 at 16:00
UPC campus Nord, B4-212 (aula seminari)


Marek Tylutki

Aalto University, 

Finland


“Imbalanced Superfluid Fermi Gas on a Lieb Lattice"

Abstract

We study the Hubbard model with spin imbalance on a Lieb lattice, which features a flat band. The flat band is known to enhance superfluidity due to a diverging density of states. We obtain a phase diagram of this system, and we identify a variety of phases. Apart from the standard BCS and normal states, we observe the Fulde-Ferrell-Larkin-Ovchinnikov type phases with space-dependent pairing function. We also find a thermodynamically stable Sarma phase, where the imbalance coexists with a spatially uniform order parameter.

 

https://arxiv.org/abs/1802.00274