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Publication in PRL: “Emission Noise in an Interacting Quantum Dot: Role of Inelastic Scattering and Asymmetric Coupling to the Reservoirs”

The understanding of noise in quantum systems is a fundamental issue in the race to gain a sharp control of the electron transfer through nanoscopic devices. In this context, we develop a theory to calculate the emission noise in an interacting quantum dot, which is the elementary brick of quantum circuit. We establish an analytical expression for the noise which is analogous to the Meir-Wingreen formula for the current in the sense that it includes inelastic scattering contributions. A physical interpretation is given on the basis of the transmission of one electron-hole pair to the concerned reservoir where by recombining, it emits an energy. We find that the noise derivative is zero until the voltage reaches a threshold value set by the measuring frequency, beyond which a Kondo peak appears when the system is in the Kondo regime. Our findings provide a clear interpretation of recent measurements made in carbon nanotube quantum dots.

Publication reference:
“Emission Noise in an Interacting Quantum Dot: Role of Inelastic Scattering and Asymmetric Coupling to the Reservoirs”
A. Crépieux, S. Sahoo, T. Q. Duong, R. Zamoum, and M. Lavagna
Phys. Rev. Lett. 120, 107702 (2018)

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.107702

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