Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.200601
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Funding
- Defense Advanced Research Projects Agency/Multidisciplinary University Research Initiatives-Optical Lattice Emulator program
- National centers of competence in research for Quantum Information Science and Technology of the Swiss National Science foundation
- seventh framework program Project Thermiq
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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.
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