Quantum Optics Group (LMU) - Quantum Many Body Systems Division (MPQ)

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.

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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.

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Max Planck Institute of Quantum Optics

Hans-Kopfermann-Str. 1
85748 Garching, Germany 

Phone: +49 (0)89 32905 - 138 
Fax: +49 (0)89 32905 - 313

Kristina Schuldt

Quantum Optics Chair/
Fakultät für Physik 

Schellingstr. 4
80799 Munich, Germany

Phone: +49 (0)89 2180 - 6131
Fax: +49 (0)89 2180 - 63850

Ildiko Kecskesi