Magnetic field effects on the finite-frequency noise and ac conductance of a Kondo quantum dot out of equilibrium

Autor(en)

Sarah Müller, Mikhail Pletyukhov, Dirk Schuricht, Sabine Andergassen

Abstrakt

We present analytic results for the finite-frequency current noise and the nonequilibrium ac conductance for a Kondo quantum dot in presence of a magnetic field. Using the real-time renormalization group method, we determine the line shape close to resonances and show that while all resonances in the ac conductance are broadened by the transverse spin relaxation rate, the noise at finite field additionally involves the longitudinal rate as well as sharp kinks resulting in singular derivatives. Our results provide a consistent theoretical description of recent experimental data for the emission noise at zero magnetic field, and we propose the extension to finite field for which we present a detailed prediction.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Rheinisch-Westfälische Technische Hochschule Aachen, JARA Fundamentals of Future Information Technology

Journal

Physical Review B

Band

87

Anzahl der Seiten

18

ISSN

1098-0121

DOI

https://doi.org/10.1103/PhysRevB.87.245115

Publikationsdatum

06-2013

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103025 Quantenmechanik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/51de2e54-2902-48ba-9651-a783e6cfcf57