Expansion dynamics of the Fulde-Ferrell-Larkin-Ovchinnakov state

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2011-10-10

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Department of Applied Physics

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Language

en

Pages

4
1-4

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PHYSICAL REVIEW A, Volume 84, issue 4

Abstract

We consider a two-component Fermi gas in the presence of spin imbalance, modeling the system in terms of a one-dimensional attractive Hubbard Hamiltonian initially in the presence of a confining trap potential. With the aid of the time-evolving block decimation method, we investigate the dynamics of the initial state when the trap is switched off. We show that the dynamics of a gas initially in the Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state is decomposed into the independent expansion of two fluids, namely the paired and the unpaired particles. In particular, the expansion velocity of the unpaired cloud is shown to be directly related to the FFLO momentum. This provides an unambiguous signature of the FFLO state in a remarkably simple way.

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expansion dynamics, the Fulde-Ferrell-Larkin-Ovchinnikov state

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DOI

10.1103/PhysRevA.84.041601

Citation

Kajala, J, Massel, F & Törmä, P 2011, ' Expansion dynamics of the Fulde-Ferrell-Larkin-Ovchinnakov state ', Physical Review A, vol. 84, no. 4, 041601, pp. 1-4 . https://doi.org/10.1103/PhysRevA.84.041601

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https://urn.fi/URN:NBN:fi:aalto-201609163857

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[article-cris] Perustieteiden korkeakoulu / SCI