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arXiv · 1308.2945

Negative Off-Diagonal Conductivities in a Weakly Coupled Quark Gluon Plasma

Jiunn-Wei Chen·Yen-Fu Liu·Shi Pu·Yu-Kun Song·Qun Wang
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Abstract

We calculate the conductivity matrix of a weakly coupled quark-gluon plasma at the leading-log order. By setting all quark chemical potentials to be identical, the diagonal conductivities become degenerate and positive, while the off-diagonal ones become degenerate but negative (or zero when the chemical potential vanishes). This means a potential gradient of a certain fermion flavor can drive backward currents of other flavors. A simple explanation is provided for this seemingly counter intuitive phenomenon. It is speculated that this phenomenon is generic and most easily measured in cold atom experiments.

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Jiunn-Wei Chen, Yen-Fu Liu, Shi Pu, Yu-Kun Song, Qun Wang. 2013-08-13. Negative Off-Diagonal Conductivities in a Weakly Coupled Quark Gluon Plasma. https://doi.org/10.1103/physrevd.88.085039

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