  Thermodynamic currents can fluctuate significantly at the nanoscale. But some
currents fluctuate less than others. Hyperaccurate currents are those which
fluctuate the least, in the sense that they maximize the signal-to-noise ratio
(precision). In this letter we analytically determine the hyperaccurate current
in the case of a quantum thermoelectric, modeled by the Landauer-B\"uttiker
formalism.
