corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 91 » Issue 10
< Previous Article | Next Article >

Phys. Rev. Lett. 91, 106801 (2003) [4 pages]

Quantum Charge Fluctuations and the Polarizability of the Single-Electron Box

Download: PDF (132 kB) Buy this article Export: BibTeX or EndNote (RIS)

K. W. Lehnert1,*, B. A. Turek1, K. Bladh2, L. F. Spietz1, D. Gunnarsson2, P. Delsing2, and R. J. Schoelkopf1,†
1Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06511 USA
2Microtechnology Center at Chalmers MC2, Department of Microelectronics and Nanoscience, Chalmers University of Technology and Göteborg University, SE-412 96, Göteborg, Sweden

Received 20 February 2003; published 5 September 2003

We measure the average charge on the island of a single-electron box, with an accuracy of two thousandths of an electron. Thermal fluctuations alone cannot account for the dependence of the average charge on temperature, on external potential, or on the quasiparticle density of states in the metal from which the box is formed. In contrast, we find excellent agreement between these measurements and a theory that treats the quantum fluctuations of charge perturbatively.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.106801
DOI:
10.1103/PhysRevLett.91.106801
PACS:
73.23.Hk, 73.63.Kv, 85.35.Gv

*Electronic address: konrad.lehnert@jila.colorado.edu

Permanent address: JILA, National Institute of Standards and Technology and University of Colorado, Boulder, CO, 80309-0440.

†Group website: www.eng.yale.edu\rslab

 
< Previous Article | Next Article >