Regensburg 2022 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 27: Quantum Coherence and Quantum Information Systems (joint session TT/DY)

TT 27.9: Vortrag

Donnerstag, 8. September 2022, 11:45–12:00, H22

Synchronized coherent charge oscillations in coupled double quantum dots — •Eric Kleinherbers¹, Philipp Stegmann², and Jürgen König¹ — ¹Faculty of Physics and CENIDE, University Duisburg-Essen, 47057 Duisburg, Germany — ²Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

We study coherent charge oscillations in double quantum dots tunnel-coupled to metallic leads [1]. If two such systems are coupled by Coulomb interaction, there are in total six (instead of only two) oscillation modes of the entangled system with interaction-dependent oscillation frequencies. By tuning the bias voltage, one can engineer decoherence such that only one of the six modes, in which the charge oscillations in both double quantum dots become synchronized in antiphase, is singled out. We suggest to use waiting-time distributions and the g⁽²⁾-correlation function to detect the common frequency and the phase locking.

[1] E. Kleinherbers et al., Phys. Rev. B 104, 165304 (2021)