Quantum control of spin-correlations in ultracold lattice gases

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Date: 
2012-08-09
Author(s): 

P. Hauke, R. J. Sewell, M. W. Mitchell, M. Lewenstein

Reference: 

arXiv:1208.1861v1 [quant-ph]

DOI: 10.1103/PhysRevA.87.021601

We demonstrate that it is possible to prepare a lattice gas of ultracold atoms with a desired non-classical spin-correlation function using atom-light interaction of the kind routinely employed in quantum spin polarization spectroscopy. Our method is based on quantum non-demolition (QND) measurement and feedback, and allows in particular to create on demand exponentially or algebraically decaying correlations, as well as a certain degree of multi-partite entanglement.