Hanbury Brown & Twiss -
Spatial Quantum Noise Correlations
Noise Correlations Measurement Schematic
Shadow images of expanding ultracold atom clouds are registered on the pixels of a CCD detector (left). Each pixel measures the atom number in a column extending from each pixel (red and blue columns). The noise in the atom numbers detected on two different pixels is correlated due to the Hanbury Brown and Twiss effect and depends on the properties of the source.
Quantum Noise Correlation Data
On the left an absorption image can be seen, whose average is just a simple gaussian and does not contain any information on the many particle state in the lattice. However, the noise is correlated (right image) at distances depending on the initial periodic separation of the particles in the trap.
Max-Planck-Institut für Quantenoptik
85748 Garching, Germany
Phone: +49 (0)89 32905 - 138
Fax: +49 (0)89 32905 - 313
Quantum Optics Chair/
Fakultät für Physik
80799 Munich, Germany
Phone: +49 (0)89 2180 - 6131
Fax: +49 (0)89 2180 - 63850