Noise of a Chargeless Fermi Liquid.
Noise of a Chargeless Fermi Liquid.
复制标题
无电荷费米液体的噪声。
DOI:
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发表时间:
2017
影响因子:
8.6
通讯作者:
G. Zaránd
中科院分区:
文献类型:
--
作者:
C. P. Moca;C. Mora;I. Weymann;G. Zaránd
We construct a Fermi liquid theory to describe transport in a superconductor-quantum dot-normal metal junction close to the singlet-doublet (parity changing) transition of the dot. Though quasiparticles do not have a definite charge in this chargeless Fermi liquid, in the case of particle-hole symmetry, a mapping to the Anderson model unveils a hidden U(1) symmetry and a corresponding pseudocharge. In contrast to other correlated Fermi liquids, the back scattering noise reveals an effective charge equal to the charge of Cooper pairs, e^{*}=2e. In addition, we find a strong suppression of noise when the linear conductance is unitary, even for its nonlinear part.