Peltier cooling of fermionic quantum gases.
- Grenier Ch Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland.
- Georges A Collège de France, 11 place Marcelin Berthelot, 75005 Paris, France; Centre de Physique Théorique, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France; and DPMC, Université de Genève, CH-1211 Geneva, Switzerland.
- Kollath C HISKP, University of Bonn, Nussallee 14-16, D-53115 Bonn, Germany.
- 2014-11-29
Published in:
- Physical review letters. - 2014
English
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 in this way than by using only evaporative cooling.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.113.200601
- PMID 25432033
- Persistent URL
- https://sonar.ch/global/documents/217284
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