Collective modes in the anisotropic unitary Fermi gas and the inclusion of a backflow term

L. Salasnich, P. Comaron, M. Zambon, and F. Toigo
Phys. Rev. A 88, 033610 – Published 9 September 2013
PDFHTMLExport Citation

Abstract

We study the collective modes of the confined unitary Fermi gas under anisotropic harmonic confinement as a function of the number of atoms. We use the equations of extended superfluid hydrodynamics, which take into account a dispersive von Weizsäcker-like term [C. F. von Weizsäcker, Z. Phys. 96, 431 (1935)] in the equation of state. We also discuss the inclusion of a backflow term in the extended superfluid Lagrangian and the effects of this anomalous term on sound waves and the Beliaev damping of phonons [S. T. Beliaev, Sov. Phys. JETP 7, 299 (1958)].

  • Figure
  • Figure
  • Received 2 May 2013

DOI:https://doi.org/10.1103/PhysRevA.88.033610

©2013 American Physical Society

Authors & Affiliations

L. Salasnich, P. Comaron, M. Zambon, and F. Toigo

  • Dipartimento di Fisica e Astronomia “Galileo Galilei” and CNISM, Università di Padova, Via Marzolo 8, 35131 Padova, Italy

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 88, Iss. 3 — September 2013

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required

Log In
Other Options
×

Download & Share

PDFExportReuse & PermissionsCiting Articles (3)
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search

Article Lookup

Paste a citation or DOI
Enter a citation
×