Ultracold quantum matter

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

Phys Rev Lett 103:17 (2009) 170404

Authors:

J Ruostekoski, CJ Foot, AB Deb

Abstract:

We propose a method of using off-resonant light scattering to measure the temperature of fermionic atoms tightly confined in a two-dimensional optical-lattice potential. We show that fluctuations of the intensity in the far-field diffraction pattern arising from thermal correlations of the atoms can be accurately detected above the shot noise by collecting photons scattered in a forward direction, with the diffraction maxima blocked. The sensitivity of this method of thermometry is enhanced by an additional harmonic trapping potential.
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Light scattering for thermometry of fermionic atoms in an optical lattice

(2009)

Authors:

J Ruostekoski, CJ Foot, AB Deb
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Double well potentials and quantum gates

(2009)

Authors:

CJ Foot, M Shotter
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Enhancement of on-site interactions of tunneling ultracold atoms in optical potentials using radio-frequency dressing

Physical Review A American Physical Society (APS) 78:5 (2008) 051602

Authors:

Martin Shotter, Dimitrios Trypogeorgos, Christopher Foot
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Dynamic optical lattices: two-dimensional rotating and accordion lattices for ultracold atoms.

Opt Express 16:21 (2008) 16977-16983

Authors:

RA Williams, JD Pillet, S Al-Assam, B Fletcher, M Shotter, CJ Foot

Abstract:

We demonstrate a novel experimental arrangement which can rotate a 2D optical lattice at frequencies up to several kilohertz. Ultracold atoms in such a rotating lattice can be used for the direct quantum simulation of strongly correlated systems under large effective magnetic fields, allowing investigation of phenomena such as the fractional quantum Hall effect. Our arrangement also allows the periodicity of a 2D optical lattice to be varied dynamically, producing a 2D accordion lattice.
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