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Ultra-sensitive force measurements are crucial for physics. Nanometer precision displacement measurements of a Paul trapped 174Yb+ ion provides force sensitivities below aN/√Hz. Accuracy was verified by measuring the 95 zN cooling laser light force pressure.
We have used a single trapped atomic ion to induce and measure a large optical phase shift of 1.3 radians in light scattered by the atom by utilizing spatial interferometry based on absorption imaging.
By utilizing absorption imaging we have observed a controllable, radian-level optical phase shift of scattered light for an isolated atomic ion in free space. A schematic of the experimental apparatus is shown on the left hand side of Fig. 1. A single 174Yb+ ion is trapped in ultra-high vacuum using a double-needle radio-frequency (RF) quadrupole Paul trap. Laser light at 369.5 nm, near resonance...
The metastable 2F7/2 and 2D3/2 states of Yb+ are of interest for applications in metrology and quantum information and also act as dark states in laser cooling. These metastable states are commonly repumped to the ground state via the 638.6 nm 2F7/2–1D[5/2]5/2 and 935.2 nm 2D3/2–3D[3/2]1/2 transitions. We have performed optogalvanic spectroscopy of these transitions in Yb+ ions generated in a discharge...
We demonstrate the first absorption imaging of a single atom. Absorption depths of up to 2.6(2)% were observed for laser cooled 174Yb+ ions illuminated at 369.5 nm and imaged with a phase Fresnel lens.
Trapped ions are a leading system for implementing quantum information processing (QIP) on a small scale. A clear roadmap exists for achieving large scale QIP [1, 2] including the use of phase Fresnel lens (PFL) arrays as scalable optical interconnect [3]. Recently, we have demonstrated the successful integration of a single microfabricated PFL with an RF ion trap in UHV and in close proximity to...
Thermometry of trapped ions is an important diagnostic for quantum computing and atomic clocks. Existing thermometry techniques for trapped ions rely on spectroscopy, which is vulnerable to systematic errors induced by laser cooling dynamics. High resolution imaging of ion fluorescence provides a steady state thermometry technique which is independent of the laser cooling dynamics. To achieve sufficient...
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