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Poster Session

Poster Session III

4:00 pm – 6:00 pm, Thursday June 19 Session S00 Oregon Convention Center:, Exhibit Hall E
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Towards a Multi-Minute Lattice Atom Interferometer

Poster 136
Presenter: Garrett Louie (University of California, Berkeley)
Authors: Matthew Tao (University of California, Berkeley), James Egelhoff (University of California, Berkeley), Prabudhya Bhattacharya (University of California, Berkeley), Cristian Panda (University of Arizona), Holger Mueller (University of California, Berkeley), Jon Pratt (NIST), Stephan Schlamminger (National Institute of Standards and Technology (NIST)), Jack Manley (NIST), Gayathrini Premawardhana (University of Maryland College Park), Jacob Taylor (Joint Quantum Institute and Joint Center for Quantum Information and Computer Science, University of Maryland/NIST), Daniel Carney (Lawrence Berkeley National Laboratory, Berkeley, CA 94720)



Matter wave interferometry using a spatial superposition of ultracold atoms is a powerful tool for precision metrology. In our lattice atom interferometer, the interrogation time is increased by levitating the atoms in an optical lattice generated by the mode of an optical cavity. Our recent demonstrations of minute scale spatial coherence in a lattice atom interferometer have shown that decoherence is caused by ensemble dephasing of the thermal atoms in the presence of tilt-noise. We are constructing a new experiment to extend coherence to the multi-minute scale by suppressing tilt-noise in the most vulnerable frequency band with active vibration isolation of the whole mechanical system, as well as by reducing temperature and phase space density through evaporative cooling to below the recoil limit. As a part of this new apparatus, we will also integrate a high-Q, diamagnetic torsion pendulum with the long term goal of generating non classical atom-oscillator states and probing the coherence of gravity. 

Funding acknowledgement

We acknowledge support from the Heising-Simons Foundation, the National Science Foundation, and the John Templeton foundation.

POSTERS (141)