Synthetic Gauge Fields in Synthetic Dimensions for Ultracold Atoms and Photons

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• Hannah Price (Trento)
• Thursday 27 October 2016, 13:45-15:00
• Theory Library.

If you have a question about this talk, please contact Mike Gunn.

The concept of a synthetic dimension has recently emerged as a powerful way to implement artificial gauge fields and create topological energy bands for neutral particles. In this approach, internal degrees of freedom are reinterpreted as lattice sites along an additional “fake” dimension, while an artificial gauge field can be imprinted by controlling the external coupling between these synthetic lattice sites. In ultracold gases, this approach has already been successfully implemented by using different internal atomic states to provide the synthetic dimension [1]. In this talk, I will discuss how we can extend these ideas to more general settings in cold atoms [2] as well as to integrated photonics, where topological edge states could be used for practical applications [3]. Importantly, adding a synthetic dimension also increases the number of effective “spatial” dimensions in which the particles move. We show how this can be exploited to realise the 4D quantum Hall effect for the first time in both ultracold gases [4] and photonics [3], setting the stage for the future exploration of novel topological phases in higher dimensions.

O.Boada et al., Phys. Rev. Lett. 108, 133001 (2012); A.Celi et al., Phys. Rev. Lett. 112, 043001 (2014); M.Mancini et al., Science 349, 1510 (2015); B.K.Stuhl et al., Science 349, 1514 (2015).

H.M. Price, T.Ozawa, N.Goldman, arXiv:1605.09310.

T.Ozawa, H.M.Price, N.Goldman, O.Zilberberg, I.Carusotto, Phys. Rev. A 93, 043827 (2016).

H.M.Price, O.Zilberberg, T.Ozawa, I.Carusotto, N.Goldman, Phys. Rev. Lett. 115, 195303 (2015).

This talk is part of the Theoretical Physics Seminars series.

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