ON QUANTUM NOISE

ON QUANTUM NOISE
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DOI:
10.1007/978-94-011-0019-9_28
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发表时间:
1995
期刊:
--
影响因子:
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通讯作者:
B. Muzykantskii;D. Khmelnitskii
B. Muzykantskii;D. Khmelnitskii
中科院分区:
其他
文献类型:
--
作者:
B. Muzykantskii;D. Khmelnitskii

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讨论了量子点接触中电流噪声的分布函数。特别感兴趣的是超导体与正常金属的接触。提出了Lesovik-Levitov公式的一种新的推导方法。结果表明,对于SN点接触,噪声的分布描述了± e0或± 2 e0电荷通过接触时的独立过程。在低温和低电压下,只有双电荷转移过程是相关的。在零温度和低电压下,分布具有二项形式。
We discuss the distribution function for the current noise in Quantum point contacts. Special interest is paid to contact of a superconductor with a normal metal. A new derivation of the Lesovik-Levitov formulae is suggested. It is shown, for the SN point contacts, that the distribution of the noise describes independent processes when charge ±e0or ±2e0passes through the contact. At low temperature and voltage only processes with double charge transfer are relevant. At zero temperature and low voltage the distribution has a binomial form.