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Continuous Beam of Laser-Cooled Ytterbium Atoms for Precision Measurements

Electronic Theses of Indian Institute of Science

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Field Value
 
Title Continuous Beam of Laser-Cooled Ytterbium Atoms for Precision Measurements
 
Creator Rathod, Ketan D
 
Subject Symmetry
Laser-Cooled Ytterbium Atoms
Rubidium Atoms
Thermal Beams
Continuous Beams
Ytterbium Atoms
Ramsey Fringes
Magneto Optical Trap (MOT)
Atoms in Oscillating Fields
Yb
Laser Cooled Yb Atoms
Rb
Cold Rb Atom
Physics
 
Description What if an elementary particle such as an electron had an intrinsic electric dipole moment (EDM)? Existence of such an EDM would be an indication of time-reversal symmetry
violation in the laws of Physics. The Standard model of Physics is considered incomplete, and theories that go beyond the standard model predict existence of such EDM’s within experimental reach. Experiments that search for their existence serve as a test bed for these theories. Use of laser-cooled Yb atoms launched in a fountain for EDM search has been proposed earlier.
This thesis describes the main experimental work on generating a continuous cold
beam of Yb atoms using laser cooling. Such cold beams are ideal for performing EDM
experiments and have several advantages over the more common pulsed fountain. We
demonstrate two ways to achieve this (i) extracting the beam from atoms trapped in 2-
dimensions and (ii) deflecting the atomic beam using 1D-optical molasses. We find that
the latter method gives a longitudinal temperature of 41 mK, which is a factor of 3 better than the former one. We also demonstrate the implementation of Ramsey’s separated oscillatory field technique in a thermal beam to measure the larmor precession frequency with high precision. This serves as a first step towards implementation with cold beam.
Extending the work reported here, we suggest future experiment for measuring an EDM.
 
Contributor Natarajan, Vasant
 
Date 2017-11-22T04:57:31Z
2017-11-22T04:57:31Z
2017-11-22
2014
 
Type Thesis
 
Identifier http://hdl.handle.net/2005/2781
http://etd.ncsi.iisc.ernet.in/abstracts/3646/G26609-Abs.pdf
 
Language en_US
 
Relation G26609