Competition Between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases Near Feshbach Resonances

Abstract

We study the quench dynamics of a two-component ultracold Fermi gas from the weak into the strong interaction regime, where the short time dynamics are governed by the exponential growth rate of unstable collective modes. We obtain an effective interaction that takes into account both Pauli blocking and the energy dependence of the scattering amplitude near a Feshbach resonance. Using this interaction we analyze the competing instabilities towards Stoner ferromagnetism and pairing.

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Document Details

Document Type
Technical Report
Publication Date
May 13, 2010
Accession Number
ADA524116

Entities

People

  • David Pekker
  • Eugene A. Demler
  • Lode Pollet
  • Martin W. Zwierlein
  • Mehrtash Babadi
  • Nilolaj Zinner
  • Rajdeep Sensarma

Organizations

  • Harvard University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplitude
  • Angular Momentum
  • Band Structures
  • Competition
  • Dynamics
  • Energy
  • Fermi Levels
  • Fermi Surfaces
  • Frequency
  • Instability
  • Kinetic Energy
  • Magnetic Fields
  • Momentum
  • Physics
  • Resonance
  • Subatomic Particles
  • Universities

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.