کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1842148 | 1031409 | 2008 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Competing orders in one-dimensional half-integer fermionic cold atoms: A conformal field theory approach
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The physical properties of arbitrary half-integer spins F=Nâ1/2 fermionic cold atoms loaded into a one-dimensional optical lattice are investigated by means of a conformal field theory approach. We show that for attractive interactions two different superfluid phases emerge for F⩾3/2: A BCS pairing phase, and a molecular superfluid phase which is formed from bound-states made of 2N fermions. In the low-energy approach, the competition between these instabilities and charge-density waves is described in terms of ZN parafermionic degrees of freedom. The quantum phase transition for F=3/2,5/2 is universal and shown to belong to the Ising and three-state Potts universality classes respectively. In contrast, for F⩾7/2, the transition is non-universal. For a filling of one atom per site, a Mott transition occurs and the nature of the possible Mott-insulating phases are determined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 798, Issue 3, 1 August 2008, Pages 443-469
Journal: Nuclear Physics B - Volume 798, Issue 3, 1 August 2008, Pages 443-469
نویسندگان
P. Lecheminant, P. Azaria, E. Boulat,