Pair Correlations of a Spin-Imbalanced Fermi Gas on Two-Leg Ladders

A. E. Feiguin and F. Heidrich-Meisner

Phys. Rev. Lett. 102, 076403 – Published 19 February 2009

Abstract

We study the pair correlations of a spin-imbalanced two-leg ladder with attractive interactions, using the density matrix renormalization group method. We identify regions in the phase diagram spanned by the chemical potential and the magnetic field that can harbor Fulde-Ferrell-Larkin-Ovchinnikov- (FFLO-)like physics. Results for the pair structure factor, exhibiting multiple pairing wave vectors, substantiate the presence of FFLO-like correlations. We further discuss phase separation scenarios induced by a harmonic trap, which differ from the case of isolated chains.

Received 9 September 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.076403

Authors & Affiliations

A. E. Feiguin^1,2 and F. Heidrich-Meisner³

¹Microsoft Project Q, University of California, Santa Barbara, California 93106, USA
²Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA
³Institut für Theoretische Physik C, RWTH Aachen University, 52056 Aachen, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 102, Iss. 7 — 20 February 2009

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review Letters