Noise in the Coulomb blockade electrometer
- 13 July 1992
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 61 (2), 237-239
- https://doi.org/10.1063/1.108195
Abstract
We have measured the noise of a Coulomb blockade electrometer. Below 100 Hz, the noise referred to the input charge has a 1/f power spectrum with a charge noise of 3×10−4 e/√Hz and an energy sensitivity EN of 3×104 ℏ at 10 Hz. The 1/f noise probably results from the stochastic occupation of charge traps which could in principle be eliminated. The theoretical noise floor is set by shot noise, and indirect measurements show that this contribution to EN can be as small as 1.5 ℏ, suggesting that the electrometer will be a quantum limited amplifier if the 1/f noise can be eliminated.Keywords
This publication has 14 references indexed in Scilit:
- Direct observation of macroscopic charge quantizationZeitschrift für Physik B Condensed Matter, 1991
- Single electron pump fabricated with ultrasmall normal tunnel junctionsPhysica B: Condensed Matter, 1991
- Virtual electron diffusion during quantum tunneling of the electric chargePhysical Review Letters, 1990
- Tunneling time and offset charging in small tunnel junctionsPhysica B: Condensed Matter, 1990
- Single-electron charging effects in one-dimensional arrays of ultrasmall tunnel junctionsPhysical Review Letters, 1989
- Observation of single-electron charging effects in small tunnel junctionsPhysical Review Letters, 1987
- Experimental tests for the quantum behavior of a macroscopic degree of freedom: The phase difference across a Josephson junctionPhysical Review B, 1987
- Single-electron transistors: Electrostatic analogs of the DC SQUIDSIEEE Transactions on Magnetics, 1987
- Electron trap states and low frequency noise in tunnel junctionsIEEE Transactions on Magnetics, 1987
- Quantum limits on noise in linear amplifiersPhysical Review D, 1982