Quantum Charge Fluctuations and the Polarizability of the Single Electron Box
Konrad Lehnert, B A. Turek, K Bladh, L F. Spietz, D Gunnarsson, P Delsing
We measure the average charge on a single-electron box, with an accuracy of 10-3 e as a function of an externally applied potential. At this accuracy, we observe that the total capacitance of the box is a function of temperature, of external potential and of the quasiparticle density of states in the metal from which the box is formed. We find excellent agreement between these measurements and a theory that treats the quantum fluctuations of charge perturbatively.
, Turek, B.
, Bladh, K.
, Spietz, L.
, Gunnarsson, D.
and Delsing, P.
Quantum Charge Fluctuations and the Polarizability of the Single Electron Box, Physical Review Letters
(Accessed May 28, 2023)