Probing the quantum behavior of a nanomechanical resonator coupled to a double quantum dot

Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5839

Title:	Probing the quantum behavior of a nanomechanical resonator coupled to a double quantum dot
Authors:	Li, ZZ Ouyang, S Lam, CH You, JQ
Issue Date:	15-Jun-2012
Source:	Physical review. B, Condensed matter and materials physics, 15 June 2012, v. 85, no. 23, 235420, p. 1-6
Abstract:	We propose a current correlation spectrum approach to probe the quantum behaviors of a nanomechanical resonator (NAMR). The NAMR is coupled to a double quantum dot (DQD), which acts as a quantum transducer and is further coupled to a quantum-point contact (QPC). By measuring the current correlation spectrum of the QPC, shifts in the DQD energy levels, which depend on the phonon occupation in the NAMR, are determined. Quantum behaviors of the NAMR could, thus, be observed. In particular, the cooling of the NAMR into the quantum regime could be examined. In addition, the effects of the coupling strength between the DQD and the NAMR on these energy shifts are studied. We also investigate the impacts on the current correlation spectrum of the QPC due to the backaction from the charge detector on the DQD.
Publisher:	American Physical Society
Journal:	Physical review. B, Condensed matter and materials physics
ISSN:	1098-0121
EISSN:	1550-235X
DOI:	10.1103/PhysRevB.85.235420
Rights:	© 2012 The American Physical Society. The Journal's web site is located at http://prb.aps.org/
Appears in Collections:	Journal/Magazine Article

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