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Fundamental quantum limit in precision phase measurement

✍ Scribed by Ou, Z. Y.


Book ID
126297146
Publisher
The American Physical Society
Year
1997
Tongue
English
Weight
238 KB
Volume
55
Category
Article
ISSN
1050-2947

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We consider a mesoscopic conductor, in which a quantum interference current J can be modulated by an external "input" variable I. The Z is either a classical variable such as a gate voltage, or a quantum-mechanical one such as a photon number. Assuming that the conductor is fabricated perfcdly, i.e.