Cooling a nanomechanical resonator by a triple quantum dot

Zeng Zhao Li, Shi Hua Ouyang, Chi Hang Lam, J. Q. You

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)


We propose an approach for achieving ground-state cooling of a nanomechanical resonator (NAMR) capacitively coupled to a triple quantum dot (TQD). This TQD is an electronic analog of a three-level atom in Λ configuration which allows an electron to enter it via lower-energy states and to exit only from a higher-energy state. By tuning the degeneracy of the two lower-energy states in the TQD, an electron can be trapped in a dark state caused by destructive quantum interference between the two tunneling pathways to the higher-energy state. Therefore, ground-state cooling of an NAMR can be achieved when electrons absorb readily and repeatedly energy quanta from the NAMR for excitations.
Original languageEnglish
Article number40003
Issue number4
Publication statusPublished - 1 Aug 2011

ASJC Scopus subject areas

  • General Physics and Astronomy


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