One-dimensional two-orbital SU(N) ultracold fermionic quantum gases at incommensurate filling: A low-energy approach

被引：11

作者：

Bois, V. ^{[1
]}

Fromholz, P. ^{[1
]}

Lecheminant, P. ^{[1
]}

机构：

[1] Univ Cergy Pontoise, CNRS UMR 8089, Lab Phys Theor & Modelisat, Site St Martin, F-95300 Cergy Pontoise, France

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 13期

关键词：

CONFORMAL FIELD-THEORY; SYMMETRY; SPECTRUM; PHASES; ATOMS;

D O I：

10.1103/PhysRevB.93.134415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the zero-temperature phase diagram of two-orbital SU(N) fermionic models at incommensurate filling which are directly relevant to strontium and ytterbium ultracold atoms loading into a one-dimensional optical lattice. Using a low-energy approach that takes into account explicitly the SU(N) symmetry, we find that a spectral gap for the nuclear-spin degrees of freedom is formed for generic interactions. Several phases with one or two gapless modes are then stabilized which describe the competition between different density instabilities. In stark contrast to the N = 2 case, no dominant pairing instabilities emerge and the leading superfluid one is rather formed from bound states of 2N fermions.

引用

收藏

页数：11

相关论文

共 55 条

[1] CRITICAL-THEORY OF QUANTUM SPIN CHAINS [J].

AFFLECK, I ;

HALDANE, FDM .

PHYSICAL REVIEW B, 1987, 36 (10) :5291-5300

[2] THE KONDO EFFECT, CONFORMAL FIELD-THEORY AND FUSION RULES [J].

AFFLECK, I ;

LUDWIG, AWW .

NUCLEAR PHYSICS B, 1991, 352 (03) :849-862

[3] EXACT CRITICAL EXPONENTS FOR QUANTUM SPIN CHAINS, NONLINEAR SIGMA-MODELS AT THETA=PI AND THE QUANTUM HALL-EFFECT [J].

AFFLECK, I .

NUCLEAR PHYSICS B, 1986, 265 (03) :409-447

[4] DERIVATION OF THE CHIRAL GROSS-NEVEU SPECTRUM FOR ARBITRARY SU(N) SYMMETRY [J].

ANDREI, N ;

LOWENSTEIN, JH .

PHYSICS LETTERS B, 1980, 90 (1-2) :106-110

[5] Competing superconducting instabilities in the one-dimensional p-band degenerate cold fermionic system [J].

Bois, V. ;

Capponi, S. ;

Lecheminant, P. ;

Moliner, M. .

PHYSICAL REVIEW B, 2015, 92 (07)

[6] Phase diagrams of one-dimensional half-filled two-orbital SU(N) cold fermion systems [J].

Bois, V. ;

Capponi, S. ;

Lecheminant, P. ;

Moliner, M. ;

Totsuka, K. .

PHYSICAL REVIEW B, 2015, 91 (07)

[7] Duality approach to one-dimensional degenerate electronic systems [J].

Boulat, E. ;

Azaria, P. ;

Lecheminant, P. .

NUCLEAR PHYSICS B, 2009, 822 (03) :367-407

[8] Direct Observation of Coherent Interorbital Spin-Exchange Dynamics [J].

Cappellini, G. ;

Mancini, M. ;

Pagano, G. ;

Lombardi, P. ;

Livi, L. ;

de Cumis, M. Siciliani ;

Cancio, P. ;

Pizzocaro, M. ;

Calonico, D. ;

Levi, F. ;

Sias, C. ;

Catani, J. ;

Inguscio, M. ;

Fallani, L. .

PHYSICAL REVIEW LETTERS, 2014, 113 (12)

[9] Molecular superfluid phase in systems of one-dimensional multicomponent fermionic cold atoms [J].

Capponi, S. ;

Roux, G. ;

Lecheminant, P. ;

Azaria, P. ;

Boulat, E. ;

White, S. R. .

PHYSICAL REVIEW A, 2008, 77 (01)

[10] Phases of one-dimensional SU(N) cold atomic Fermi gases-From molecular Luttinger liquids to topological phases [J].

Capponi, S. ;

Lecheminant, P. ;

Totsuka, K. .

ANNALS OF PHYSICS, 2016, 367 :50-95

← 1 2 3 4 5 6 →