A Cylindrically Symmetric, Magnetic Trap for Bose-Einstein Condensate Atom Interferometry Applications

Horne, R. A.

doi:10.18130/v32k2j

Cited by 2 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The scope of the dissertation is to present a technique to measure the potential profile of an atom trap created by Horne [6]. The fluorescence-based tomographic technique developed is able to measure the potential profile in three dimensions up to the fourth-order terms in spatial coordinate dependence.…”

Section: Scopementioning

confidence: 99%

“…Our atomic "bob" is a Bose-Einstein condensate (BEC). First constructed by Horne [6], our adjustable science trap, a type of a magnetic atom trap, provides the trapping potential. To make the entire cloud of trapped atoms oscillate, we install a magnetic coil, the "kick coil", capable of displacing the center of the magnetic atom trap.…”

Section: Apparatus Descriptionmentioning

confidence: 99%

“…The discussion here provides a brief overview of the apparatus and the process of creating a cold atom cloud. The apparatus and the process are discussed in more detail in Horne's thesis [6]. In general, our procedure for creating a Bose-Einstein condensate largely follows the methods described in [28].…”

Section: Apparatus Descriptionmentioning

confidence: 99%

“…atomic clocks [4], gravimetry [5], Sagnac interferometer for rotation sensing [6], or, in our group, electric polarizability of Rubidium-87 measurement using a condensate interferometer [7]. For most of the applications, a trapping potential used to create a BEC and support the atoms against gravity has significant effect on the outcome of a measurement.…”

Section: Chapter 1 Introductionmentioning

confidence: 99%

“…For most of the applications, a trapping potential used to create a BEC and support the atoms against gravity has significant effect on the outcome of a measurement. An example is the dual Sagnac interferometer proposed by Horne [6].…”

Section: Chapter 1 Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Characterizing the Potential Energy of an Atom Trap Through Tomographic Fluorescence Imaging

Arpornthip

View full text Add to dashboard Cite

We have developed a technique to fully characterize an arbitrary potential energy of an atom trap. The characterization allows one to measure the symmetry of the trap, a determining factor in many trapped atom applications. Created through a magneto-optical trap and evaporative cooling, a cold atom cloud is first loaded into our weakly-confined time-orbiting potential (TOP) trap. The whole atom cloud is then optically pumped into a dark state, an energy level that does not interact with the probe laser light. A selected part of the atom cloud is reactivated by a repump light which optically pump the atoms back into a state that can be probed. The repump light is shaped into a light sheet 168 µm thick. The reactivated region interacts with the probe laser light to create a fluorescence image. Since the light sheet is much thinner than the atom cloud, which is roughly 2 mm wide, the fluorescence image obtained is a cross-section of the atom cloud. A movable light sheet allows us to generate crosssection images of the cloud at different positions. A composite image of all the crosssection images shows the complete potential profile of our atom trap. This is similar to tomographic imaging used in medical imaging. We have verified the technique with two other methods: direct oscillation measurement at varying amplitude and numerical simulation of the atom trap. The technique is able to measure the potential up to the fourth-order terms in spatial coordinates. A complete characterization of the atom trap's symmetry will allow us to develop an atomic Foucault pendulum, a novel application for trapped atoms.

show abstract

Section: Scopementioning

confidence: 99%

Section: Apparatus Descriptionmentioning

confidence: 99%

Section: Apparatus Descriptionmentioning

confidence: 99%

Section: Chapter 1 Introductionmentioning

confidence: 99%

Section: Chapter 1 Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Characterizing the Potential Energy of an Atom Trap Through Tomographic Fluorescence Imaging

Arpornthip

View full text Add to dashboard Cite

show abstract

Fast phase stabilization of a low frequency beat note for atom interferometry

Horne

Sackett

2016

Review of Scientific Instruments

View full text Add to dashboard Cite

Atom interferometry experiments rely on the ability to obtain a stable signal that corresponds to an atomic phase. For interferometers that use laser beams to manipulate the atoms, noise in the lasers can lead to errors in the atomic measurement. In particular, it is often necessary to actively stabilize the optical phase between two frequency components of the beams. Typically this is achieved using a time-domain measurement of a beat note between the two frequencies. This becomes challenging when the frequency difference is small and the phase measurement must be made quickly. The method presented here instead uses a spatial interference detection to rapidly measure the optical phase for arbitrary frequency differences. A feedback system operating at a bandwidth of about 10 MHz could then correct the phase in about 3 μs. This time is short enough that the phase correction could be applied at the start of a laser pulse without appreciably degrading the fidelity of the atom interferometer operation. The phase stabilization system was demonstrated in a simple atom interferometer measurement of the (87)Rb recoil frequency.

show abstract

A Cylindrically Symmetric, Magnetic Trap for Bose-Einstein Condensate Atom Interferometry Applications

Cited by 2 publications

References 0 publications

Characterizing the Potential Energy of an Atom Trap Through Tomographic Fluorescence Imaging

Characterizing the Potential Energy of an Atom Trap Through Tomographic Fluorescence Imaging

Fast phase stabilization of a low frequency beat note for atom interferometry

Contact Info

Product

Resources

About