Atomic Physics with Cluster Computing

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Atomic Physics with Cluster Computing
M. Crescimanno Department of Physics and
Astronomy Youngstown State University R.
Walsworth , D. Phillips Harvard -Smithsonian
Center for Astrophysics
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Biostatistics Parallel Algorithyms Conformational
Chemistry Astrophysical Modelling Atomic Physics
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Atomic Physics and Cluster Computing
Bose -Einstein Condensate Vortices
Time
-gt
New, All-Optical Atomic Clock
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Why Small Atomic Clocks?

• Cell Phone Repeaters

• GPS System

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Rb Atomic Clock
Optical table lasers, optics and magnetic shields

• QL 15,000
• split endplate design for double bulb
• mechanical tuning
• access for fiber optical detector

(Source D. Phillips)
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Schematic of All-Optical Atomic Clock
cell oven solenoid shields
cell oven solenoid shields
12 GHz photodetector
3.42 GHz EOM

laser diode
isolator
3.42 GHz drive
x
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M
u
l
t
p
l
i
e
r
6.84 GHz LO
p
o
w
e
r

l
e
v
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l




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d
B
m
f
r
e
q

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.
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3
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G
H
z
DC feedback signal
VCXO
(Source D. Phillips, R. Walsworth)
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Why so good?
(Data from D. Philips)

• Environmental susceptibility

• Intrinsic jitter

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Simulation
calculations performed in C/GSL/IDL
parameters chosen to match experimental
conditions
output lineshapes
from literature and our measurements
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Absorption on Resonance
Little spike of transparency in middle...
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Electromagnetically Induced Transparency
Yes, you are 'pumping' to a Dark state
Here, as before but smaller scale
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Stability
Look closer yet, here with a 8MHz detuning of
the one-photon pump beam.
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Boltzmann Sumed Response
Also at an 8MHz detuning of the one photon
resonance
but here at room temperature
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Next Step Spatio -temporal modelling

• Lamb -Dicke Narrowing

• Modulation rate effects

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Congratulations Cluster Ohio II !!
For those of you just starting out...
Problem Want to run serial jobs that are all
different, but don't want to have to launch
them individually or sequentially.
Solution two handy scripts
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First is the run.sh shell script
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Second is the PBS script
Here called asym.pbs
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Conclusion
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Many Much
Smooth Flowing Happy
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