High-Precision Measurement of the Laser-Trapping Frequencies for $^{209,210,211}$ Fr AtomsHigh-Precision Measurement of the Laser-Trapping Frequencies for $^{209,210,211}$Fr Atoms

Sanguinetti, S., R. Calabrese, L. Corradi +9 more

We present the accurate measurement of the frequency of the $7S-7P$ laser-trapping transition for three francium isotopes. Our approach is based on an interferometric comparison to deduce the unknown laser frequency from a secondary laser frequency-standard. After careful investigation of systematics, with samples of about 100 atoms the final accuracy reaches 8 MHz, an order of magnitude better than the best previous measurement for $^{210}$ Fr, and opens the way to improved tests of the theoretical computation of Fr atomic structure.We present the accurate measurement of the frequency of the $7S-7P$ laser-trapping transition for three francium isotopes. Our approach is based on an interferometric comparison to deduce the unknown laser frequency from a secondary laser frequency-standard. After careful investigation of systematics, with samples of about 100 atoms the final accuracy reaches 8 MHz, an order of magnitude better than the best previous measurement for $^{210}$Fr, and opens the way to improved tests of the theoretical computation of Fr atomic structure.

arXiv:0807.4397Jul 28, 20084 citations

Precision measurements with atom interferometry

Steven Chu, David S. Weiss, Brent C. Young

Quantum Electronics and Laser Science ConferenceMay 2, 19930 citations

ATOM INTERFEROMETRY EXPERIMENTS IN FUNDAMENTAL PHYSICS

Sheng‐wey Chiow, Sven Herrmann, Steven Chu +1 more

Symposium on Frequency Standards and MetrologyMay 1, 20090 citations

Physical system for horizontal counter-propagating atom interferometric gyroscope

Xianhua Wang, Sen Jia, Yue Zhang +1 more

Utilizing the matter wave and Sagnac effect, the horizontal angular velocity and acceleration of a carrier can be precisely measured by a horizontal counter-propagating atom interferometric gyroscope. The physical system for horizontal counter-propagating atom interferometric gyroscope incorporates an ultrahigh vacuum environment along with specifically designed magnetic distributions and optical paths to control and detect atom states via lasers. We analyze the operational principles of the atom interferometric gyroscope, clarifying its functional requirements and basic mechanical components. From the theoretical analysis, critical specifications such as vacuum levels and magnetic field distributions in each functional area have been proposed. As a result, a comprehensive physical system for the atom interferometric gyroscope has been established. The measurement results indicate that the vacuum is maintained at 10−8 Pa, and each of the generated cold atom clouds in a three-dimensional magneto-optical trap has a diameter of ∼6 mm, contains ∼108 atoms, and maintains a temperature of 11 μK, fulfilling the prerequisites for horizontal angular velocity and acceleration measurements.Utilizing the matter wave and Sagnac effect, the horizontal angular velocity and acceleration of a carrier can be precisely measured by a horizontal counter-propagating atom interferometric gyroscope. The physical system for horizontal counter-propagating atom interferometric gyroscope incorporates an ultrahigh vacuum environment along with specifically designed magnetic distributions and optical paths to control and detect atom states via lasers. We analyze the operational principles of the atom interferometric gyroscope, clarifying its functional requirements and basic mechanical components. From the theoretical analysis, critical specifications such as vacuum levels and magnetic field distributions in each functional area have been proposed. As a result, a comprehensive physical system for the atom interferometric gyroscope has been established. The measurement results indicate that the vacuum is maintained at 10−8 Pa, and each of the generated cold atom clouds in a three-dimensional magneto-optical trap has a diameter of ∼6 mm, contains ∼108 atoms, and maintains a temperature of 11 μK, fulfilling the prerequisites for horizontal angular velocity and acceleration measurements.

Optical EngineeringMay 29, 20250 citations

Precision Measurements with Atom Interferometers

David E. Pritchard

APSApr 1, 19970 citations

High-Precision Measurement of the Laser-Trapping Frequencies for

^{209,210,211}

Fr Atoms

We present the accurate measurement of the frequency of the

7S-7P

laser-trapping transition for three francium isotopes. Our approach is based on an interferometric comparison to deduce the unknown laser frequency from a secondary laser frequency-standard. After careful investigation of systematics, with samples of about 100 atoms the final accuracy reaches 8 MHz, an order of magnitude better than the best previous measurement for

^{210}

Fr, and opens the way to improved tests of the theoretical computation of Fr atomic structure.