Quantum refrigerators and the third law of thermodynamics.

@article{Levy2012QuantumRA,
  title={Quantum refrigerators and the third law of thermodynamics.},
  author={Amikam Levy and Robert Alicki and Ronnie Kosloff},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2012},
  volume={85 6 Pt 1},
  pages={
          061126
        }
}
The rate of temperature decrease of a cooled quantum bath is studied as its temperature is reduced to absolute zero. The third law of thermodynamics is then quantified dynamically by evaluating the characteristic exponent ζ of the cooling process dT(t)/dt∼-T^{ζ} when approaching absolute zero, T→0. A continuous model of a quantum refrigerator is employed consisting of a working medium composed either by two coupled harmonic oscillators or two coupled two-level systems. The refrigerator is a… 

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