Browsing by Author "Walsworth, R.L."

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    Bound on Lorentz and $CPT$ violating boost effects for the neutron
    (American Physical Society, 2004) Canè, F.; Bear, D.; Phillips, D.F.; Rosen, M.S.; Smallwood, C.L.; Stoner, R.E.; Walsworth, R.L.; Kostelecký, V.A.
    A search for an annual variation of a daily sidereal modulation of the frequency difference between colocated $^{129}\text{Xe}$ and $^{3}\text{He}$ Zeeman masers sets a stringent limit on boost-dependent Lorentz and $CPT$ violation involving the neutron, consistent with no effect at the level of 150 nHz. In the framework of the general standard-model extension, the present result provides the first clean test for the fermion sector of the symmetry of spacetime under boost transformations at a level of $10^{−27}$  GeV.
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    Limit on Lorentz and $CPT$ Violation of the Neutron Using a Two-Species Noble-Gas Maser
    (American Physical Society, 2000) Bear, D.; Stoner, R.E.; Walsworth, R.L.; Kostelecký, V.A.; Lane, C.D.
    A search for sidereal variations in the frequency difference between co-located $^{129}\text{Xe}$ and $^{3}\text{He}$ Zeeman masers sets the most stringent limit to date on leading-order Lorentz and $CPT$ violation involving the neutron, consistent with no effect at the level of $10^{−31}$ $\text{GeV}$.