asymmetry of forces at 3d molasses
אסף שיינפלד
np.array([0., 1., 0.]), np.array([0., -1., 0.]),
np.array([0., 0., 1.]), np.array([0., 0., -1.])]
Barker, Daniel S. (Fed)
Hi Assaf,
The only thing that jumps out to me about the laser beam configuration is that the polarizations are not all the same. I would have either had all entries to the array equal -pol or flipped the polarization for both z-axis beams to produce the MOT polarization configuration.
Have you tried using pylcp.conventional3DMOTBeams to produce your molasses configuration? If so, do you get the same result?
Daniel
From: py...@googlegroups.com <py...@googlegroups.com>
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Sent: Tuesday, December 17, 2024 7:06 AM
To: pylcp <py...@googlegroups.com>
Subject: asymmetry of forces at 3d molasses
Hey,
We are using pylcp to analyze the influence of constant magnetic field on 3-d molasses. We get a strange thing, that even for zero magnetic field(or magnetic field with equal projection on x/y/z), and same sig+-sig- couple of beams along x/y/z, the forces are not the same along the line that bisects the 3 axes. specificaly, it seems that Fz has opposite sign.
Without magnetic field :
With magnetic field:
Can you think of why can it be?
our lasers:
kvecs = [np.array([1.,
0.,
0.]), np.array([-1.,
0.,
0.]),
np.array([0.,
1.,
0.]), np.array([0.,
-1.,
0.]),
np.array([0.,
0.,
1.]), np.array([0.,
0., -1.])]
pols = [-pol, -pol, -pol, -pol, pol, -pol]
magnetic_field_x=magnetic_field_y=magnetic_field_z
v=\sqrt(3)v'
v_x=v_y=v_z=v'
Assaf
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אסף שיינפלד
hey,