On confined fractional charges: a simple model

Details On confined fractional charges: a simple model On confined fractional charges: a simple model

2006-04-28

arxiv.org/abs/cond-mat/0604666v1

Europhys. Lett., 75 (1), pp. 133-138 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1209/epl/i2006-10092-x

We address the question whether features known from quantum chromodynamics (QCD) can possibly also show up in solid-state physics. It is shown that spinless fermions of charge $e$ on a checkerboard lattice with nearest-neighbor repulsion provide for a simple model of confined fractional charges. After defining a proper vacuum the system supports excitations with charges $\pm e/2$ attached to the ends of strings. There is a constant confining force acting between the fractional charges. It results from a reduction of vacuum fluctuations and a polarization of the vacuum in the vicinity of the connecting strings.

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