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Shot Noise in a Mesoscopic Interferometer |
| ZHANG Guang-Biao1;WANG Shun-Jin1,2;LI Lei1 |
| 1Department of Modern Physics, Lanzhou University, 730000 Lanzhou
2Department of Physics, Sichuan University, Chengdu 610064 |
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| Cite this article: |
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ZHANG Guang-Biao, WANG Shun-Jin, LI Lei 2006 Chin. Phys. Lett. 23 1570-1573 |
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Abstract The charge conductance and the shot noise in an Aharonov--Bohm interferometer with double quantum dots embedded and coupled to each other by a capacity are studied in the framework of the equation of motion of Green’s function. From the impurity Anderson model Hamiltonian, the equations of motion of nonequilibrium Green functions are derived and solved including the effects of two body correlations under Lacroix’s approximation. Our results show that the conductance, the shot noise, and the Fano factor (the ratio of the shot noise to the Poisson noise) as functions of the magnetic flux oscillate with the period of h/e, and their oscillation behaviour is similar to the results of the experiment replacing the capacitive coupling by tunnelling between the two dots. The experiment is suggested to test the results.
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| Keywords:
72.70.+m
73.63.Kv
73.23.-b
72.25.Mk
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Published: 01 June 2006
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| PACS: |
72.70.+m
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(Noise processes and phenomena)
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73.63.Kv
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(Quantum dots)
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73.23.-b
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(Electronic transport in mesoscopic systems)
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72.25.Mk
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(Spin transport through interfaces)
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