Seminarium Optyczne

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 (multi-pixel) 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 [1]. In our experiment, the two beams are formed by correlated pairs [2] of ultracold metastable helium atoms [3] 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.References:1. “Ghost Imaging with Atoms”, R.I. Khakimov, B.M. Henson, D.K. Shin, S.S. Hodgman, R.G. Dall, K.G.H. Baldwin and A.G. Truscott (2016). http://arxiv.org/abs/1607.022402. “Direct measurement of long-range third-order coherence in Bose-Einstein condensates”, S. S. Hodgman, R. G. Dall, A. G. Manning, K. G. H. Baldwin, and A. G. Truscott, Science 331, 1046 (2011).http://science.sciencemag.org/content/331/6020/1046.full.pdf3. “Cold and trapped metastable noble gases”, W. Vassen, C. Cohen-Tannoudji, M. Leduc, D. Boiron, C. I. Westbrook, A. Truscott, K. Baldwin, G. Birkl, P. Cancio, and M. Trippenbach, Reviews of Modern Physics 84, 175 (2012). http://journals.aps.org/rmp/abstract/10.1103/RevModPhys.84.175

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 (multi-pixel) 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 [1]. In our experiment, the two beams are formed by correlated pairs [2] of ultracold metastable helium atoms [3] 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.References:1. “Ghost Imaging with Atoms”, R.I. Khakimov, B.M. Henson, D.K. Shin, S.S. Hodgman, R.G. Dall, K.G.H. Baldwin and A.G. Truscott (2016). http://arxiv.org/abs/1607.022402. “Direct measurement of long-range third-order coherence in Bose-Einstein condensates”, S. S. Hodgman, R. G. Dall, A. G. Manning, K. G. H. Baldwin, and A. G. Truscott, Science 331, 1046 (2011).http://science.sciencemag.org/content/331/6020/1046.full.pdf3. “Cold and trapped metastable noble gases”, W. Vassen, C. Cohen-Tannoudji, M. Leduc, D. Boiron, C. I. Westbrook, A. Truscott, K. Baldwin, G. Birkl, P. Cancio, and M. Trippenbach, Reviews of Modern Physics 84, 175 (2012). http://journals.aps.org/rmp/abstract/10.1103/RevModPhys.84.175