CIfAR Cosmology and Gravity Program, Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T 1Z1, Canada.
Philos Trans A Math Phys Eng Sci. 2012 Sep 28;370(1975):4460-8. doi: 10.1098/rsta.2011.0495.
The temperature of an oscillator coupled to the vacuum state of a heat bath via Ohmic coupling is non-zero, as measured by the reduced density matrix of the oscillator. This study shows that the actual temperature, as measured by a thermometer, is still zero (or, in the thermal state of the bath, the temperature of the bath). The decoherence temperature is due to 'false-decoherence', with a correlation between the oscillator and the heat bath causing the decoherence, but the heat baths state dragged along with the state of the oscillator.
通过欧姆耦合与热浴的真空态耦合的振荡器的温度不为零，这可以通过振荡器的约化密度矩阵来测量。本研究表明，实际温度（由温度计测量）仍然为零（或者在浴的热态下，为浴的温度）。退相干温度是由于“虚假退相干”引起的，振荡器与热浴之间的相关性导致退相干，但热浴的状态与振荡器的状态一起被拖曳。
