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Related Experiment Videos

Matter-wave interferometry with phase fluctuating Bose-Einstein condensates.

G-B Jo1, J-H Choi, C A Christensen

  • 1MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Physical Review Letters
|February 1, 2008
PubMed
Summary
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Atom interferometers using elongated Bose-Einstein condensates (BECs) are robust against phase fluctuations. However, coherence time is limited by larger fluctuations and interferometer asymmetries.

Area of Science:

  • Quantum physics
  • Atomic physics

Background:

  • Elongated Bose-Einstein condensates (BECs) display significant spatial phase fluctuations below the critical temperature.
  • These fluctuations can impact the performance of atom interferometers.

Purpose of the Study:

  • To investigate the robustness of atom interferometers utilizing elongated BECs against spatial phase fluctuations.
  • To identify factors limiting the coherence time in such interferometers.

Main Methods:

  • Utilized atom interferometry with elongated Bose-Einstein condensates.
  • Analyzed the impact of axial phase fluctuations on the relative phase reproducibility.
  • Investigated the effect of interferometer asymmetries on coherence time.

Main Results:

Related Experiment Videos

  • Demonstrated that atom interferometers are robust against phase fluctuations, showing reproducible relative phase.
  • Identified that larger phase fluctuations significantly reduce coherence time.
  • Observed that asymmetries in the interferometer wells exacerbate coherence time limitations.

Conclusions:

  • Atom interferometers with elongated BECs offer a robust platform for measurements despite inherent phase fluctuations.
  • Minimizing phase fluctuations and interferometer asymmetries is crucial for maximizing coherence time and precision.