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<b><span style="font-size: 18pt;">Seminar on<o:p></o:p></span></b></p>
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<b><span style="font-size: 8pt; font-family: 'Times New Roman';"> </span></b></p>
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<b><span style="font-size: 24pt; letter-spacing: 1.5pt;">Modern Optics and Spectroscopy</span></b><span style="font-size: 24pt; font-family: Arial; letter-spacing: 1.5pt;"><o:p></o:p></span></p>
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<b><span style="font-size: 16pt; font-family: Arial; letter-spacing: 1pt;"> <o:p></o:p></span></b></p>
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<b><i><span style="font-size: 20pt; letter-spacing: 1pt;">Rapid Deceleration of Atoms and Molecules by Bichromatic Optical Forces<o:p></o:p></span></i></b></p>
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<b><i><span style="font-size: 16pt; letter-spacing: 1pt;"> </span></i></b></p>
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<b> </b></p>
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<b><span style="font-size: 24pt;">Edward Eyler<o:p></o:p></span></b></p>
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<b><span style="font-size: 8pt;"> </span></b></p>
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<span style="font-size: 18pt; font-family: 'Times New Roman'; font-weight: normal; font-style: normal;">Physics Department, University of Connecticut<o:p></o:p></span></p>
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<span style="font-size: 22pt; letter-spacing: 1pt;">Tuesday, March 29, 2016<o:p></o:p></span></p>
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<span style="font-size: 22pt; letter-spacing: 1pt;">12:00 – 1:00 p.m.<o:p></o:p></span></p>
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<span style="letter-spacing: 1pt;"> </span></p>
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The optical bichromatic force is a coherent optical force that can be orders of magnitude stronger than the saturated radiative force used commonly for laser cooling and trapping, while also exhibiting a much wider velocity range. It relies on a momentum transfer
process in which photons are absorbed from a two-frequency beam, then coherently emitted into a separate counterpropagating beam. Because this coherent cycling can be much faster than radiative decay, momentum transfer is rapid and losses from radiative decay
into inaccessible “dark” states are minimized. My group has been exploring applications of coherent optical forces for deceleration and cooling of both atoms and molecules, using a combination of experimental studies and computer modeling. The bichromatic
force looks particularly promising for simplifying the production and trapping of ultracold molecules. We have selected the <i><span style="letter-spacing: 2pt;">B</span></i><span style="letter-spacing: 2pt;">↔</span><i>X</i> transition of calcium monofluoride
(CaF) as a target system, for which detailed numerical simulations have recently been completed and experimental tests are presently underway.<o:p></o:p></p>
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<span style="font-size: 16pt;">Grier Room, MIT Bldg. 34-401A<o:p></o:p></span></p>
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<span style="font-size: 16pt;">Refreshments served after the lecture</span></p>
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