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Ghost Imaging with Atoms

Event Details

Event Dates: 

Thursday, February 2, 2017 - 2:00pm

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Professor Kenneth Baldwin

Speaker Affiliation(s): 

Deputy Director Research, Research School of Physics and Engineering, The Australian National University
Seminar Type/Subject

Scientific Seminar Type: 

  • Other

Seminar Type Other: 

JILA Internal Meeting

Event Details & Abstract: 

Ghost imaging is a technique––first realized in quantum optics––that uses the cross-correlation between particles in two separate beams, one of which passes through the object to a bucket (single-pixel) detector, while the second is measured by a high spatial resolution (multipixel) detector, but never interacts with the object. Neither detector can reconstruct the image independently. Here we report on the first realisation of ghost imaging of a macroscopic object using massive particles. In our experiment, the two beams are formed by correlated pairs of ultracold metastable helium atoms originating from two colliding Bose-Einstein condensates (BECs). We use higher-order Kapitza-Dirac scattering to generate the large number of correlated atom pairs required, enabling the creation of a ghost image with good visibility and sub-millimetre resolution.