36,949 research outputs found
Quantum metrology to probe atomic parity nonconservation
Full text linkAn entangled state prepared in a decoherence free sub-space together with a
Ramsey type measurement can probe parity violation in heavy alkali ions like
Ba+ or Ra+. Here we propose an experiment with Ba+ as an example to measure the
small parity violating effect in this system. It has been shown that a
measurement on a maximally correlated system will reduce the uncertainty as
compared to that on a single ion measurement. In addition it also provides a
feasible solution to measure the nuclear spin dependent part of the total
parity violating light shift in an ionic system which has so far not been
addressed.Comment: 4 pages, 3 figure
Dynamics of ion cloud in a linear Paul trap
Full text linkA linear ion trap setup has been developed for studying the dynamics of
trapped ion cloud and thereby realizing possible systematics of a high
precision measurement on a single ion within it. The dynamics of molecular
nitrogen ion cloud has been investigated to extract the characteristics of the
trap setup. The stability of trap operation has been studied with observation
of narrow nonlinear resonances pointing out the region of instabilities within
the broad stability region. The secular frequency has been measured and the
motional spectra of trapped ion oscillation have been obtained by using
electric dipole excitation. It is applied to study the space charge effect and
the axial coupling in the radial plane.Comment: Colloquium paper, 9 pages, 6 figure
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