Light scattering for thermometry of fermionic atoms in an optical lattice

Details Light scattering for thermometry of fermionic atoms in an optical lattice Light scattering for thermometry of fermionic atoms in an optical lattice

2009-09-02

arxiv.org/abs/0909.0491v1

Phys. Rev. Lett. 103 (2009) 170404

Physics

Condensed Matter

Quantum Gases

submitted to PRL in January 2009

Scientific paper

10.1103/PhysRevLett.103.170404

We propose a method for measuring the temperature of fermionic atoms in an optical lattice potential from the intensity of the scattered light in the far-field diffraction pattern. We consider a single-component gas in a tightly-confined two-dimensional lattice, illuminated by far off-resonant light driving a cycling transition. Our calculations show that thermal correlations of the fermionic atoms generate fluctuations in the intensity of the diffraction pattern of light scattered from the atomic lattice array and that this signal can be accurately detected above the shot noise using a lens to collect photons scattered in a forward direction (with the diffraction maxima blocked). The sensitivity of the thermometer is enhanced by an additional harmonic trapping potential.

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