Summary
We propose a scheme for surpassing the standard quantum limit (SQL) of phase sensitivity in electron interferometry. A nonlinear interferometer with Coulomb coupling between two arms is shown to generate phase-correlated electron states. The minimum detectable phase is improved from the SQL (total electron number)−1/2 to (total electron number)−5/6 by replacing an input linear coupler of a phase-sensing interferometer with the nonlinear interferometer. A possible experimental scheme in a mesoscopic system is discussed.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Caves CM (1981) Phys Rev D23: 1693
Kimble HJ, Walls DF (eds) (1987) J Opt Soc Am B4: 1450
Loudon R, Knight PL (1987) J Mod Opt 34: 709
Yurke B (1986) Phys Rev Lett 56: 1515
Yurke B (1988) Physica (Amsterdam) 151B: 286
Kitagawa M, Ueda M (1991) Phys Rev Lett 67: 1852
Yurke B, McCall SL, Klauder JR (1986) Phys Rev A33: 4033
Kitagawa M, Ueda M In: Musha T, Sato S, Yamamoto M (eds) Proceedings of the international conference on noise in physical systems and 1/f fluctuations (ICNF-91). Ohmsha, Tokyo, pp 355
Klauder JR, Skagerstam BS (1985) Coherent states. World Scientific, Singapore
Kitagawa M, Yamamoto Y (1986) Phys Rev A34: 3974
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1992 Springer Japan
About this paper
Cite this paper
Kitagawa, M., Ueda, M. (1992). Sub-Quantum-Limit Electron Interferometers. In: Namba, S., Hamaguchi, C., Ando, T. (eds) Science and Technology of Mesoscopic Structures. Springer, Tokyo. https://doi.org/10.1007/978-4-431-66922-7_7
Download citation
DOI: https://doi.org/10.1007/978-4-431-66922-7_7
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-66924-1
Online ISBN: 978-4-431-66922-7
eBook Packages: Springer Book Archive