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Topic Area: Atomic Physics
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Displaying records 21 to 30 of 85 records.
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21. Wavelengths, Transition Probabilities, and Energy Levels for the Spectra of Barium (Ba III through Ba LVI)
Topic: Atomic Physics
Published: 11/19/2010
Authors: Jean Ellen Sansonetti, John J Curry
Abstract: Energy levels, with designations and uncertainties, have been compiled for the spectra of barium (Z=56) ions from doubly-ionized to hydrogen-like. Wavelengths with classifications, intensities, and transition probabilities are also tabulated. In addi ...

22. 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 ...

23. 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 ...

24. Low-Frequency Characterization of MEMS-Based Portable Atomic Magnetometer
Topic: Atomic Physics
Published: 6/2/2010
Authors: Rahul R. (Rahul) 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 ...

25. 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 ...

26. 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 ...

27. 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 ...

28. 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 ...

29. Weight Functions for Biases in Atomic Frequency Standards
Topic: Atomic Physics
Published: 3/1/2010
Author: Jon Hardy Shirley
Abstract: Many perturbations that affect atomic frequency standards vary during the period of measurement. To include this time variation, we introduce three time-dependent weight functions built from the solution of the unperturbed equations of motion of a t ...

30. Quantum information processing and quantum control with trapped atomic ions
Topic: Atomic Physics
Published: 12/14/2009
Author: David J Wineland
Abstract: The role of trapped atomic ions in the field of quantum information processing is briefly reviewed. We discuss some of the historical developments that enabled ions to enter the field and then summarize the basic mechanisms required for logic gates a ...

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