Getting information from the mixed electrical-heat noise

Crépieux, Adeline; Eyméoud, Paul; Michelini, Fabienne

doi:10.1109/icnf.2017.7985926

Cited by 1 publication

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References 31 publications

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“…The understanding of noise in quantum systems is a fundamental issue when one wants to control the transfer of charges in an accurate way. The efforts in that direction in the last ten years are numerous both from the experimental side 1-7 and from the theoretical side [8][9][10][11][12][13][14][15][16][17][18] . Some of the main issues raised by the works on noise in quantum systems are the following: (i) Is the measured noise the symmetrized one or the non-symmetrized one?…”

Section: Introductionmentioning

confidence: 99%

Non-symmetrized quantum noise in a Kondo quantum dot

et al. 2018

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The fluctuations of electrical current provide information on the dynamics of electrons in quantum devices. Understanding the nature of these fluctuations in a quantum dot is thus a crucial step insofar as this system is the elementary brick of quantum circuits. In this context, we develop a theory for calculating the quantum noise at finite frequency in a quantum dot connected to two reservoirs in the presence of interactions and for any symmetry of the couplings to the reservoirs. This theory is developed in the framework of the Keldysh non-equilibrium Green function technique. We establish an analytical expression for the quantum noise in terms of the various transmission amplitudes between the reservoirs and of some effective transmission coefficient which we define. We then study the noise as a function of the dot energy level and the bias voltage. The effects of both Coulomb interactions in the dot and asymmetric couplings with the reservoirs are characterized.

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