192 citations · 769 across the 30 of their papers we have counts for
6 papers · 1 filter
Synthetic Flux Attachment
Gerard Valentí-Rojas, Niclas Westerberg, Patrik Öhberg
Topological field theories emerge at low energy in strongly-correlated condensed matter systems and appear in the context of planar gravity. In particular, the study of Chern-Simon…
Staggered Ground States in an Optical Lattice
Dean Johnstone, Niclas Westerberg, Callum W. Duncan +1
Non-standard Bose-Hubbard models can exhibit rich ground state phase diagrams, even when considering the one-dimensional limit. Using a self-consistent Gutzwiller diagonalisation a…
Observation of photon droplets and their dynamics
Kali E. Wilson, Niclas Westerberg, Manuel Valiente +4
We present experimental evidence of photon droplets in an attractive (focusing) nonlocal nonlinear medium. Photon droplets are self-bound, finite-sized states of light that are rob…
Self-bound droplets of light with orbital angular momentum
Niclas Westerberg, Kali E. Wilson, Callum W. Duncan +4
Systems with competing attractive and repulsive interactions have a tendency to condense into droplets. This is the case for water in a sink, liquid helium and dipolar atomic gases…
Nonlinear synthetic gauge potentials and sonic horizons in Bose-Einstein condensates
Salvatore Butera, Niclas Westerberg, Daniele Faccio +1
Phonons in a Bose-Einstein condensate can be made to behave as if they propagate in curved spacetime by controlling the condensate flow speed. Seemingly disconnected to this, artif…
Synthetic magnetism for photon fluids
N. Westerberg, C. Maitland, D. Faccio +3
We develop a theory of artificial gauge fields in photon fluids for the cases of both second-order and third-order optical nonlinearities. This applies to weak excitations in the p…