Quantum-projection-noise-limited interferometry with coherent atoms in a Ramsey-type setup
| Autor: | John Debs, P. A. Altin, Hans-A. Bachor, Gordon McDonald, Cristina Figl, D. Döring, John Close, Nicholas Robins |
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| Rok vydání: | 2010 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Quantum Physics Atom interferometer Atomic Physics (physics.atom-ph) business.industry Quantum limit Quantum noise FOS: Physical sciences Noise (electronics) Atomic and Molecular Physics and Optics Physics - Atomic Physics Quantum amplifier Interferometry Atom laser Optics Quantum mechanics Physics::Atomic Physics Quantum Physics (quant-ph) business Squeezed coherent state |
| Zdroj: | Physical Review A. 81 |
| ISSN: | 1094-1622 1050-2947 |
| Popis: | Every measurement of the population in an uncorrelated ensemble of two-level systems is limited by what is known as the quantum projection noise limit. Here, we present quantum projection noise limited performance of a Ramsey type interferometer using freely propagating coherent atoms. The experimental setup is based on an electro-optic modulator in an inherently stable Sagnac interferometer, optically coupling the two interfering atomic states via a two-photon Raman transition. Going beyond the quantum projection noise limit requires the use of reduced quantum uncertainty (squeezed) states. The experiment described demonstrates atom interferometry at the fundamental noise level and allows the observation of possible squeezing effects in an atom laser, potentially leading to improved sensitivity in atom interferometers. 8 pages, 8 figures, published in Phys. Rev. A |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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