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We investigate the finite temperature magnetothermoelectric response in thevicinity of a superfluid--Mott insulator quantum phase transition. We focus onthe particle-hole symmetric transitions of the Bose--Hubbard model, and combineLorentz invariance arguments with quantum Boltzmann calculations. By means ofan epsilon expansion, we find that a non-vanishing thermoelectric tensor and afinite thermal conductivity are supported in this quantum critical regime. Wecomment on the singular Nernst effect in this problem.Comment: 5 page

Publisher’s Note: Magnetothermoelectric Response at a Superfluid–Mott-Insulator Transition [Phys. Rev. Lett.98, 166801 (2007)]