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Information Hiding And Retrieval In Rydberg Wave Packets Using Half-Cycle Pulses, J.M. Murray, S.N. Pisharody, H. Wen, Chitra Rangan
Information Hiding And Retrieval In Rydberg Wave Packets Using Half-Cycle Pulses, J.M. Murray, S.N. Pisharody, H. Wen, Chitra Rangan
Physics Publications
We demonstrate an information hiding and retrieval scheme with the relative phases between states in a Rydberg wave packet acting as the bits of a data register. We use a terahertz half-cycle pulse (HCP) to transfer phase-encoded information from an optically accessible angular momentum manifold to another manifold which is not directly accessed by our laser pulses, effectively hiding the information from our optical interferometric measurement techniques. A subsequent HCP acting on these wave packets reintroduces the information back into the optically accessible data register manifold which can then be read out.
Nuclear Charge Radius For He3, D. C. Morton, Q. Wu, Gordon W. F. Drake
Nuclear Charge Radius For He3, D. C. Morton, Q. Wu, Gordon W. F. Drake
Physics Publications
An rms nuclear charge radius rc =1.9642 (11) fm for He3 is derived from measurements of the 2 S13 -2 P03 isotope shift combined with the best available data on the fine structure of He4, the hyperfine structure of He3, and an assumed rc =1.673 (1) fm for He4. The result removes a small discrepancy between some older spectroscopic determinations of rc for He3 from this transition and a more recent measurement. © 2006 The American Physical Society.