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Observation and Uses of Position-Space Bloch Oscillations in an Ultracold Gas.

  • Author(s): Geiger, Zachary A
  • Fujiwara, Kurt M
  • Singh, Kevin
  • Senaratne, Ruwan
  • Rajagopal, Shankari V
  • Lipatov, Mikhail
  • Shimasaki, Toshihiko
  • Driben, Rodislav
  • Konotop, Vladimir V
  • Meier, Torsten
  • Weld, David M
  • et al.

Published Web Location

https://arxiv.org/abs/1803.02456
No data is associated with this publication.
Abstract

We report the observation and characterization of position-space Bloch oscillations using cold atoms in a tilted optical lattice. While momentum-space Bloch oscillations are a common feature of optical lattice experiments, the real-space center-of-mass dynamics are typically unresolvable. In a regime of rapid tunneling and low force, we observe real-space Bloch oscillation amplitudes of hundreds of lattice sites, in both ground and excited bands. We demonstrate two unique capabilities enabled by tracking of Bloch dynamics in position space: measurement of the full position-momentum phase-space evolution during a Bloch cycle, and direct imaging of the lattice band structure. These techniques, along with the ability to exert long-distance coherent control of quantum gases without modulation, may open up new possibilities for quantum control and metrology.

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