'Designer atoms' for quantum metrology
Article Abstract:
A -free subspace with specifically designed entangled states was employed to demonstrate precision spectroscopy of a pair of trapped [Ca.sup.} ion. Results reveal that entangled states are not only useful for enhancing the signal-to-noise ratio in frequency measurements, a suitably designed pair of atoms also allows clock measurements in the presence of strong technical noise.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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Spectroscopy at a stretch
Article Abstract:
The dimension of a spectroscopy refers to the number of independently variable time intervals between the field pulses that induce the signals and two-dimensional spectroscopy can now be done using visible light. This allows the electronic couplings between energy levels to be measured directly and sheds new light on how molecules function in photosynthesis.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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