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

16 Citations (Scopus)

Abstract

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
JournalEPL
Volume95
Issue number4
DOIs
Publication statusPublished - 1 Aug 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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