Peltier cooling of fermionic quantum gases

Abstract

We propose a cooling scheme for fermionic quantum gases, based on the principles of the Peltier thermoelectric effect and energy filtering. The system to be cooled is connected to another harmonically trapped gas acting as a reservoir. The cooling is achieved by two simultaneous processes: (i) the system is evaporatively cooled and (ii) cold fermions from deep below the Fermi surface of the reservoir are injected below the Fermi level of the system, in order to fill the 'holes' in the energy distribution. This is achieved by a suitable energy dependence of the transmission coefficient connecting the system to the reservoir. The two processes can be viewed as simultaneous evaporative cooling of particles and holes. We show that both a significantly lower entropy per particle and faster cooling rate can be achieved than by using only evaporative cooling.

7 pages (including supplementary information), 4 figures

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Cited by in corpus (7)

• Quantum thermodynamic devices: from theoretical proposals to experimental reality
• Two-terminal transport measurements with cold atoms
• Finding the quantum thermoelectric with maximal efficiency and minimal entropy production at given power output
• Thermoelectric transport and Peltier cooling of cold atomic gases
• Relaxation Dynamics of Meso-Reservoirs
• Thermoelectricity in a junction between interacting cold atomic Fermi gases
• Density redistribution effects in fermionic optical lattices