Anomalous thermoelectric transport in two-dimensional Bose gas

Abstract

In condensed matter physics, transport measurements are essential not only for the characterization of materials, but also to discern between quantum phases and identify new ones. The extension of these measurements into atomic quantum gases is emerging and will expand the scope of quantum simulation and atomtronics. To push this frontier, we demonstrate an innovative approach to extract transport properties from the time-resolved redistribution of the particles and energy of a trapped atomic gas. Based on the two-dimensional (2D) Bose gas subject to weak three-body recombination we find clear evidence of both conductive and thermoelectric currents. We then identify the contributions to the currents from thermoelectric forces and determine the Seebeck coefficient (a.k.a. thermopower) and Lorenz number, both showing anomalous behavior in the fluctuation and superfluid regimes. Our results call for further exploration of the transport properties, particularly thermoelectric properties, of atomic quantum gases.

References in corpus (9)

• Observation of scale invariance and universality in two-dimensional Bose gases
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Dynamics of a tunable superfluid junction
• Observing the Drop of Resistance in the Flow of a Superfluid Fermi Gas
• Slow Mass Transport and Statistical Evolution of An Atomic Gas Across the Superfluid-Mott Insulator Transition
• Quantum criticality and black holes
• Strongly Interacting Two-Dimensional Bose Gases
• Shedding Light on Three-Body Recombination in an Ultracold Atomic Gas
• Probing thermoelectric transport with cold atoms

Cited by in corpus (5)

• Quantum transport in ultracold atoms
• Negative differential conductivity in an interacting quantum gas
• Transport dynamics of ultracold atoms in a triple-well transistor-like potential
• Thermoelectric transport and Peltier cooling of cold atomic gases
• Chiral spin superfluidity and spontaneous spin Hall effect of interacting bosons