# Direct probe of topological order for cold atoms

@article{Deng2014DirectPO, title={Direct probe of topological order for cold atoms}, author={Dong-Ling Deng and Sheng-Tao Wang and Luming Duan}, journal={Physical Review A}, year={2014}, volume={90}, pages={041601} }

Cold-atom experiments in optical lattices offer a versatile platform to realize various topological quantum phases. A key challenge in those experiments is to unambiguously probe the topological order. We propose a method to directly measure the characteristic topological invariants (order) based on the time-of-flight imaging of cold atoms. The method is generally applicable to detection of topological band insulators in one, two, or three dimensions characterized by integer topological…

## 25 Citations

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### Tensor monopoles and negative magnetoresistance effect in four-dimensional optical lattices

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We propose that a kind of four-dimensional (4D) Hamiltonians, which host tensor monopoles related to quantum metric tensor in even dimensions, can be simulated by ultracold atoms in the optical…