Low-density, one-dimensional quantum gases in the presence of a localized attractive potential

2008 ◽  
Vol 41 (21) ◽  
pp. 215301 ◽  
Author(s):  
J Goold ◽  
D O'Donoghue ◽  
Th Busch
Keyword(s):  
Quantum Gases ◽  
Attractive Potential ◽  
Low Density ◽  
One Dimensional

scholarly journals Collective excitations of trapped one-dimensional dipolar quantum gases

2008 ◽  
Vol 77 (1) ◽  
Author(s):  
P. Pedri ◽  
S. De Palo ◽  
E. Orignac ◽  
R. Citro ◽  
M. L. Chiofalo
Keyword(s):  
Quantum Gases ◽  
Collective Excitations ◽  
One Dimensional

FUNCTIONAL INTEGRALS AND PHASE STRUCTURES IN SINE-GORDON–THIRRING MODEL

2012 ◽  
Vol 26 (27) ◽  
pp. 1250178 ◽  
Author(s):  
JUN YAN
Keyword(s):  
Strong Coupling ◽  
Finite Temperature ◽  
Thirring Model ◽  
Attractive Potential ◽  
Functional Integrals ◽  
One Dimensional ◽  
Phase Structures ◽  
Coexistence Phase ◽  
Coupling Case ◽  
The Stability

The phase structures of one-dimensional quantum sine-Gordon–Thirring model with N-impurities coupling are studied in this paper. The effective actions at finite temperature are derived by means of the perturbation and non-perturbation functional integrals method. The stability of coexistence phase is analyzed respectively in the weak and strong coupling case. It is shown that the coexistence phase is not stable when fermions have an attractive potential g < 0, and the stable coexistence phase can form when fermions have an exclude potential g > 0.

scholarly journals Conditions for one-dimensional supersonic flow of quantum gases

2004 ◽  
Vol 70 (6) ◽  
Author(s):  
S. Giovanazzi ◽  
C. Farrell ◽  
T. Kiss ◽  
U. Leonhardt
Keyword(s):  
Supersonic Flow ◽  
Quantum Gases ◽  
One Dimensional

scholarly journals TRIONIC AND QUARTETTING PHASES IN ONE-DIMENSIONAL MULTICOMPONENT ULTRACOLD FERMIONS

2008 ◽  
Vol 17 (10) ◽  
pp. 2110-2117 ◽  
Author(s):  
P. LECHEMINANT ◽  
P. AZARIA ◽  
E. BOULAT ◽  
S. CAPPONI ◽  
G. ROUX ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Nuclear Physics ◽  
Bound States ◽  
Cold Atoms ◽  
Low Energy ◽  
Low Density ◽  
Large Domain ◽  
One Dimensional ◽  
Fermionic Systems ◽  
Numerical Approaches

We investigate the possible formation of a molecular condensate, which might be, for instance, the analogue of the alpha condensate of nuclear physics, in the context of multicomponent cold atoms fermionic systems. A simple paradigmatic model of N-component fermions with contact interactions loaded into a one-dimensional optical lattice is studied by means of low-energy and numerical approaches. For attractive interaction, a quasi-long-range molecular superfluid phase, formed from bound-states made of N fermions, emerges at low density. We show that trionic and quartetting phases, respectively for N = 3,4, extend in a large domain of the phase diagram and are robust against small symmetry-breaking perturbations.

scholarly journals Quasi-one-dimensional dipolar quantum gases

2014 ◽  
Vol 89 (2) ◽  
Author(s):  
Liming Guan ◽  
Xiaoling Cui ◽  
Ran Qi ◽  
Hui Zhai
Keyword(s):  
Quantum Gases ◽  
One Dimensional

Introduction to integrable many-body systems I

2008 ◽  
Vol 58 (6) ◽  
Author(s):  
Ladislav Šamaj
Keyword(s):  
Hard Core ◽  
Coulomb Gas ◽  
Quantum Gases ◽  
Many Body ◽  
One Dimensional ◽  
Introductory Course ◽  
Pairwise Interactions ◽  
Classical Models ◽  
Physical Level ◽  
Many Body Systems

Introduction to integrable many-body systems IThis is the first volume of a three-volume introductory course about integrable (exactly solvable) systems of interacting bodies. The aim of the course is to derive and analyze, on an elementary mathematical and physical level, the Bethe ansatz solutions, ground-state properties and the thermodynamics of integrable many-body systems in many domains of physics: Nonrelativistic one-dimensional continuum Fermi and Bose gases; One-dimensional quantum models of condensed matter physics like the Heisenberg, Hubbard and Kondo models; Relativistic models of the (1+1)-dimensional Quantum Field Theory like the Luttinger model, the sine-Gordon model and its fermionic analog the Thirring model; Two-dimensional classical models, especially the symmetric Coulomb gas. In the first part of this volume, we deal with nonrelativistic one-dimensional continuum Fermi and Bose quantum gases of spinless (identical) particles with specific types of pairwise interactions like the short-range δ-function and hard-core interactions, and the long-range 1/

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