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Phys. Rev. B 63, 201311(R) (2001) [4 pages]

Dephasing effect in photon-assisted resonant tunneling through quantum dots

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Junren Shi1, Zhongshui Ma1,2, and X. C. Xie1,3
1Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078
2Advanced Research Center, Zhongshan University, Guangzhou, China
3International Center for Quantum Structures, Beijing 100080, China

Received 5 January 2001; revised 5 March 2001; published 7 May 2001

We analyze dephasing in single and double quantum dot systems. The decoherence is introduced by the Büttiker model with current conserving fictitious voltage leads connected to the dots. By using the nonequilibrium Green function method, we investigate the dephasing effect on the tunneling current. It is shown that a finite dephasing rate leads to observable effects. The result can be used to measure dephasing rates in quantum dots.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.63.201311
DOI:
10.1103/PhysRevB.63.201311
PACS:
73.23.Ad, 73.40.Gk, 72.10.Bg
 
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