Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures

I Titvinidze, A Privitera, S-Y Chang, S Diehl, M A Baranov, A Daley, W Hofstetter

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We study the phase diagram of an SU(3)-symmetric mixture of three-component ultracold fermions with attractive interactions in an optical lattice, including the additional effect on the mixture of an effective three-body constraint induced by three-body losses. We address the properties of the system in D ≥ 2 by using dynamical mean-field theory and variational Monte Carlo techniques. The phase diagram of the model shows a strong interplay between magnetism and superfluidity. In the absence of the three-body constraint (no losses), the system undergoes a phase transition from a color superfluid (c-SF) phase to a trionic phase, which shows additional particle density modulations at half-filling. Away from the particle-hole symmetric point the c-SF phase is always spontaneously magnetized, leading to the formation of different c-SF domains in systems where the total number of particles of each species is conserved. This can be seen as the SU(3) symmetric realization of a more general tendency for phase separation in three-component Fermi mixtures. The three-body constraint strongly disfavors the trionic phase, stabilizing a (fully magnetized) c-SF also at strong coupling. With increasing temperature we observe a transition to a non-magnetized SU(3) Fermi liquid phase.

LanguageEnglish
Article number035013
Number of pages34
JournalNew Journal of Physics
Volume13
DOIs
Publication statusPublished - 16 Mar 2011

Fingerprint

color
phase diagrams
superfluidity
Fermi liquids
liquid phases
tendencies
fermions
modulation
interactions
temperature

Keywords

  • constraint theory
  • variational techniques
  • phase diagrams
  • Monte Carlo methods
  • mixtures
  • mean field theory
  • Fermi liquids

Cite this

Titvinidze, I., Privitera, A., Chang, S-Y., Diehl, S., Baranov, M. A., Daley, A., & Hofstetter, W. (2011). Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures. New Journal of Physics, 13, [035013]. https://doi.org/10.1088/1367-2630/13/3/035013
Titvinidze, I ; Privitera, A ; Chang, S-Y ; Diehl, S ; Baranov, M A ; Daley, A ; Hofstetter, W. / Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures. In: New Journal of Physics. 2011 ; Vol. 13.
@article{ab94e63d22a94933ac1c8af4af766eab,
title = "Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures",
abstract = "We study the phase diagram of an SU(3)-symmetric mixture of three-component ultracold fermions with attractive interactions in an optical lattice, including the additional effect on the mixture of an effective three-body constraint induced by three-body losses. We address the properties of the system in D ≥ 2 by using dynamical mean-field theory and variational Monte Carlo techniques. The phase diagram of the model shows a strong interplay between magnetism and superfluidity. In the absence of the three-body constraint (no losses), the system undergoes a phase transition from a color superfluid (c-SF) phase to a trionic phase, which shows additional particle density modulations at half-filling. Away from the particle-hole symmetric point the c-SF phase is always spontaneously magnetized, leading to the formation of different c-SF domains in systems where the total number of particles of each species is conserved. This can be seen as the SU(3) symmetric realization of a more general tendency for phase separation in three-component Fermi mixtures. The three-body constraint strongly disfavors the trionic phase, stabilizing a (fully magnetized) c-SF also at strong coupling. With increasing temperature we observe a transition to a non-magnetized SU(3) Fermi liquid phase.",
keywords = "constraint theory, variational techniques, phase diagrams, Monte Carlo methods, mixtures, mean field theory, Fermi liquids",
author = "I Titvinidze and A Privitera and S-Y Chang and S Diehl and Baranov, {M A} and A Daley and W Hofstetter",
year = "2011",
month = "3",
day = "16",
doi = "10.1088/1367-2630/13/3/035013",
language = "English",
volume = "13",
journal = "New Journal of Physics",
issn = "1367-2630",

}

Titvinidze, I, Privitera, A, Chang, S-Y, Diehl, S, Baranov, MA, Daley, A & Hofstetter, W 2011, 'Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures' New Journal of Physics, vol. 13, 035013. https://doi.org/10.1088/1367-2630/13/3/035013

Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures. / Titvinidze, I; Privitera, A; Chang, S-Y; Diehl, S; Baranov, M A; Daley, A; Hofstetter, W.

In: New Journal of Physics, Vol. 13, 035013, 16.03.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures

AU - Titvinidze, I

AU - Privitera, A

AU - Chang, S-Y

AU - Diehl, S

AU - Baranov, M A

AU - Daley, A

AU - Hofstetter, W

PY - 2011/3/16

Y1 - 2011/3/16

N2 - We study the phase diagram of an SU(3)-symmetric mixture of three-component ultracold fermions with attractive interactions in an optical lattice, including the additional effect on the mixture of an effective three-body constraint induced by three-body losses. We address the properties of the system in D ≥ 2 by using dynamical mean-field theory and variational Monte Carlo techniques. The phase diagram of the model shows a strong interplay between magnetism and superfluidity. In the absence of the three-body constraint (no losses), the system undergoes a phase transition from a color superfluid (c-SF) phase to a trionic phase, which shows additional particle density modulations at half-filling. Away from the particle-hole symmetric point the c-SF phase is always spontaneously magnetized, leading to the formation of different c-SF domains in systems where the total number of particles of each species is conserved. This can be seen as the SU(3) symmetric realization of a more general tendency for phase separation in three-component Fermi mixtures. The three-body constraint strongly disfavors the trionic phase, stabilizing a (fully magnetized) c-SF also at strong coupling. With increasing temperature we observe a transition to a non-magnetized SU(3) Fermi liquid phase.

AB - We study the phase diagram of an SU(3)-symmetric mixture of three-component ultracold fermions with attractive interactions in an optical lattice, including the additional effect on the mixture of an effective three-body constraint induced by three-body losses. We address the properties of the system in D ≥ 2 by using dynamical mean-field theory and variational Monte Carlo techniques. The phase diagram of the model shows a strong interplay between magnetism and superfluidity. In the absence of the three-body constraint (no losses), the system undergoes a phase transition from a color superfluid (c-SF) phase to a trionic phase, which shows additional particle density modulations at half-filling. Away from the particle-hole symmetric point the c-SF phase is always spontaneously magnetized, leading to the formation of different c-SF domains in systems where the total number of particles of each species is conserved. This can be seen as the SU(3) symmetric realization of a more general tendency for phase separation in three-component Fermi mixtures. The three-body constraint strongly disfavors the trionic phase, stabilizing a (fully magnetized) c-SF also at strong coupling. With increasing temperature we observe a transition to a non-magnetized SU(3) Fermi liquid phase.

KW - constraint theory

KW - variational techniques

KW - phase diagrams

KW - Monte Carlo methods

KW - mixtures

KW - mean field theory

KW - Fermi liquids

UR - http://www.scopus.com/inward/record.url?scp=79953772794&partnerID=8YFLogxK

U2 - 10.1088/1367-2630/13/3/035013

DO - 10.1088/1367-2630/13/3/035013

M3 - Article

VL - 13

JO - New Journal of Physics

T2 - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 035013

ER -