394 research outputs found

    Terrestrial vs. spaceborne, quantum vs. classical tests of the equivalence principle

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    The equivalence principle can be tested by precision experiments based on classical and quantum systems, on the ground as well as in space. In many models, these tests are mostly equivalent in their ability to constrain physics beyond the Standard Model. We mention differences that nevertheless exist between spaceborne and quantum mechanical tests and their conventional competitors.Comment: Four pages for the proceedings of the sixth meeting on CPT and Lorentz symmetr

    Matter-wave Tests of the Gravitational Redshift in Space

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    A recent measurement of the gravitational redshift was based on interference of matter waves. Operation in microgravity can improve it by a factor of 10510^5 and, in some models, even 101010^{10}.Comment: Talk given at the Fifth Meeting on CPT and Lorentz Symmetry, at Indiana University, Bloomington, IN. Corrected problem with Figur

    Atom interferometry in an optical cavity

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    We propose and demonstrate a new scheme for atom interferometry, using light pulses inside an optical cavity as matter wave beamsplitters. The cavity provides power enhancement, spatial filtering, and a precise beam geometry, enabling new techniques such as low power beamsplitters (<100μW<100 \mathrm{\mu W}), large momentum transfer beamsplitters with modest power, or new self-aligned interferometer geometries utilizing the transverse modes of the optical cavity. As a first demonstration, we obtain Ramsey-Raman fringes with >75%>75\% contrast and measure the acceleration due to gravity, g\mathit{g}, to 60μg/Hz60 \mathrm{\mu \mathit{g} / \sqrt{Hz}} resolution in a Mach-Zehnder geometry. We use >107>10^7 cesium atoms in the compact mode volume (600μm600 \mathrm{\mu m} 1/e21/e^2 waist) of the cavity and show trapping of atoms in higher transverse modes. This work paves the way toward compact, high sensitivity, multi-axis interferometry.Comment: 5 pages, 6 figure

    Building Student Engagement with Google Spaces

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    Google Spaces is an easy to setup group chat that could help with community building and communication. The presenter will demonstrate creating a Google Space. The presenter will also discuss the results of having used a Google Space with a class and brainstorm with participants uses for future classes

    An Investigation of the Theology of C.W. Butler

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    The Reformation brought to light truths which had been hidden and forgotten for many years. The truth which Luther helped to bring to remembrance was that of justification by faith. This truth was the 1 source and determinate of his theology. About two hundred years later another man of God helped to bring out a forgotten truth, that of entire sanctification by faith. This man was John Wesley. This truth is regarded by many as being the source and determinate of his theology. 2 The Methodist Church, which sprang from the movement started by Wesley, spread to America, producing many great leaders. Much research has been done on the theology of Wesley and his immediate followers but a lesser amount of research has been done on those who followed him on the American scene. One of those who stood in the Wesleyan tradition in the American scene was C. W. Butler

    Effects of Jamestown-Yorktown\u27s Educational Program on Fourth Grade Students\u27 Standards of Learning Score in Virginia Studies

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    The purpose of this study was to determine if Jamestown-Yorktown\u27s educational program had an effect in fourth grade students\u27 Standards of Learning score in Virginia Studies
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