Lower limit on the achievable temperature in resonator-based sideband cooling

作     者：M. Grajcar S. Ashhab J. R. Johansson Franco Nori 

作者机构：Advanced Science Institute The Institute of Physical and Chemical Research (RIKEN) Wako-shi 351-0198 Japan Department of Experimental Physics Comenius University SK-84248 Bratislava Slovakia Center for Theoretical Physics Physics Department Applied Physics Program Center for the Study of Complex Systems The University of Michigan Ann Arbor Michigan 48109-1040 USA CREST Japan Science and Technology Agency (JST) Kawaguchi Saitama 332-0012 Japan 

出 版 物：《Physical Review B》 (Phys. Rev. B Condens. Matter Mater. Phys.)

年 卷 期：2008年第78卷第3期

页      面：035406-035406页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：National Science Foundation  NSF  (0130383) 

摘      要：A resonator with eigenfrequency ωr can be effectively used as a cooler for another linear oscillator with a much smaller frequency ωm⪡ωr. A huge cooling effect, which could be used to cool a mechanical oscillator below the energy of quantum fluctuations, has been predicted by several authors. However, here we show that there is a lower limit T∗ on the achievable temperature, given by T∗=Tmωm/ωr, that was not considered in previous work and can be higher than the quantum limit in realistic experimental realizations. We also point out that the decay rate of the resonator, which previous studies stress should be small, must be larger than the decay rate of the cooled oscillator for effective cooling.