Quantum projection noise limited interferometry with coherent atoms in a Ramsey type setup
arXiv:1002.3624 · doi:10.1103/PhysRevA.81.043633
Abstract
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
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- Characterization of a Simultaneous Dual-Species Atom Interferometer for a Quantum Test of the Weak Equivalence Principle
- Optically trapped atom interferometry using the clock transition of large Rb-87 Bose-Einstein condensates
- A Bose-condensed, simultaneous dual species Mach-Zehnder atom interferometer
- Atomic Interactions in Precision Interferometry Using Bose-Einstein Condensates
- Matter-wave recombiners for trapped Bose-Einstein condensates
- Squeezing in Bose-Einstein condensates with large numbers of atoms
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- Spin squeezing and concurrence under Lee-Yang dephasing channels
- Quantum gravimetry in the same internal state using composite light Raman pulses
- Prototyping method for Bragg-type atom interferometers
- Controlling the dynamical scale factor in a trapped atom Sagnac Interferometer