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Topic Area: Atomic Physics

Displaying records 11 to 20 of 76 records.
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11. Spherical Reference Cavities for Ultra-Stable Lasers in Non-Laboratory Environments
Topic: Atomic Physics
Published: 2/14/2011
Authors: David R Leibrandt, Michael J. (Michael) Thorpe, Mark Notcutt, Robert E. Drullinger, Till P Rosenband, James C Bergquist
Abstract: We present an ultra-stable optical cavity design that is insensitive to both vibrations and orientation. The design is based on a spherical cavity spacer which is held rigidly at two points on a diameter of the sphere. Coupling of the support force ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907288

12. Femtotesla atomic magnetometry in a microfabricated vapor cell
Topic: Atomic Physics
Published: 12/20/2010
Authors: William C. Griffith, Svenja A Knappe, John E Kitching
Abstract: We describe an optically pumped ^u87^Rb magnetometer with 4.5 fT/Hz^u1/2^ sensitivity when operated in the spin-exchange relaxation free (SERF) regime. The magnetometer uses a microfabricated vapor cell, consisting of a cavity etched in a 1 mm thick ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906531

13. Progress at NIST in measuring the D-lines of Li isotopes using an optical frequency comb
Topic: Atomic Physics
Published: 12/20/2010
Authors: Clayton Simien, Samuel Middleton Brewer, Joseph N Tan, John D Gillaspy, Craig J Sansonetti
Abstract: Precise spectroscopic experiments with light atoms can provide information about nuclear properties that are very difficult to obtain in electron scattering experiments. For example, relative nuclear radii of low-Z isotopes can be determined accurat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906251

14. Cross-validation of microfabricated atomic magnetometers with SQUIDs for biomagnetic applications
Topic: Atomic Physics
Published: 9/28/2010
Authors: Svenja A Knappe, Tillman H. Sander, Olaf Kosch, Frank Wiekhorst, John E Kitching, Lutz Trahms
Abstract: A chip-scale atomic magnetometer (CSAM) is compared with a superconducting quantum interference devices (SQUID) sensor in two biomedical applications. CSAMs are magnetic field sensors that operate at room temperature and are based on spectroscopy of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905802

15. Creation and manipulation of Feshbach resonances with radio-frequency radiation
Topic: Atomic Physics
Published: 8/12/2010
Authors: Thomas Mark Hanna, Eite Tiesinga, Paul S Julienne
Abstract: We present a simple technique for studying collisions of ultracold atoms in the presence of a magnetic field and radio-frequency radiation (rf ). Resonant control of scattering properties can be achieved by using rf to couple a colliding pair o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905337

16. Low-Frequency Characterization of MEMS-Based Portable Atomic Magnetometer
Topic: Atomic Physics
Published: 6/2/2010
Authors: Rahul Ramdas Mhaskar, Svenja A Knappe, John E Kitching
Abstract: Atomic magnetometers based on absorption or polarization rotation of light in an alkali vapor have recently demonstrated sensitivities rivaling those of superconducting quantum interference devices (SQUIDs). Miniaturization of such devices containing ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906104

17. Number Enhancement for Compact Laser-Cooled Atomic Samples by use of Stimulated Radiation Forces
Topic: Atomic Physics
Published: 6/2/2010
Authors: Elizabeth A Donley, Tara C. Liebisch, Eric Michael Blanshan, John E Kitching
Abstract: For cold samples of laser-cooled atoms to be most useful in emerging technologies such as compact atomic clocks and sensors, it is necessary to achieve small sample sizes while retaining a large number of cold atoms. We consider achieving large atom ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905990

18. Towards a compact cold atom frequency standard based on coherent populatoin trapping
Topic: Atomic Physics
Published: 6/2/2010
Authors: Francois-Xavier R. Esnault, Elizabeth A Donley, John E Kitching
Abstract: We describe in this paper the main features of a cold atom CPT based frequency standard. We explain our particular CPT configuration and our experimental setup. as well as present simulations of the expected performance (stability and major systemati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905991

19. Feshbach resonances in ultracold gases
Topic: Atomic Physics
Published: 4/29/2010
Authors: Chin P. Cheng, R Grimm, Paul S Julienne, Eite Tiesinga
Abstract: Feshbach resonances are the essential tool to control the interaction between atoms in ultracold quantum gases. They have found manifold experimental applications, opening up the way to important breakthroughs. This Review gives a broad coverage of t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900970

20. Multi-level Spectroscopy of Two-Level Systems Coupled to a dc SQUID Phase Qubit
Topic: Atomic Physics
Published: 4/7/2010
Authors: T. A. Palomaki, S. K. Dutta, R M Lewis, A J Przybysz, B. K. Cooper, H. Kwon, J. R. Anderson, C. J. Lobb, F. C. Wellstood, Eite Tiesinga
Abstract: We report spectroscopic measurements of discrete two-level systems (TLSs) coupled to a dc SQUID phase qubit with a 16 μm2 area Al/AlOx/Al junction. Applying microwaves in the 10 GHz to 11 GHz range, we found eight avoided level crossings with sp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903976