# Preservation of atomic coherence in double-well optical lattice in presence of decoherence 

Chemical Physics Theory Group, Department of Chemistry and Center of Quantum Information and Quantum Control, University of Toronto, Toronto, Ontario M5S 3H6, Canada 

Shubhrangshu Dasgupta ∗ 

(Dated: November 25, 2018) 

## Abstract 

We present a quantum interference approach to preserve coherence in the external states of an atom trapped in an optical lattice. We show that this is possible by suitably choosing the initial state of the atom. We demonstrate this in context of decoherence due to spontaneous emission in an one-dimensional optical double-well lattice. 

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