What is recorded here?
Lafarge and colleagues monitored a metallic island connected to a reservoir through four tunnel junctions. A coupled single-electron-transistor electrometer resolved discrete potential jumps as individual electrons entered or left the island, with charge remaining fixed between resolved events. Gate sweeps produced a hysteretic charge staircase. The measured switching rate greatly exceeded the simple cotunnelling prediction, exposing a limitation relevant to proposed precision charge-transfer devices.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
The observations concern a cryogenic device, calibrated charge increments and finite measurement bandwidth. They do not establish a new value of the elementary charge, error-free pumping or a universal metrological limit. The origin of the excess switching rate remained unresolved; superconducting measurements showed single-electron rather than two-electron jumps. The cited 1992 author manuscript is reproduced in a 1993 thesis.
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People and systems
Philippe Lafarge; Philippe Joyez; Hugues Pothier; Andrew Cleland; Thorsten Holst; Daniel Esteve; Cristian Urbina; Michel H. Devoret
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
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English catalogue narrative
An electrometer resolves individual electron-charge jumps on a metallic island
Lafarge and colleagues monitored a metallic island connected to a reservoir through four tunnel junctions. A coupled single-electron-transistor electrometer resolved discrete potential jumps as individual electrons entered or left the island, with charge remaining fixed between resolved events. Gate sweeps produced a hysteretic charge staircase. The measured switching rate greatly exceeded the simple cotunnelling prediction, exposing a limitation relevant to proposed precision charge-transfer devices.
Scientific scope
The observations concern a cryogenic device, calibrated charge increments and finite measurement bandwidth. They do not establish a new value of the elementary charge, error-free pumping or a universal metrological limit. The origin of the excess switching rate remained unresolved; superconducting measurements showed single-electron rather than two-electron jumps. The cited 1992 author manuscript is reproduced in a 1993 thesis.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
Philippe Lafarge; Philippe Joyez; Hugues Pothier; Andrew Cleland; Thorsten Holst; Daniel Esteve; Cristian Urbina; Michel H. Devoret
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.