704 citations · 2.7k across the 86 of their papers we have counts for
87 papers
Vortex precession and exchange in a Bose-Einstein condensate
Julien Garaud, Jin Dai, Antti J. Niemi
Vortices in a Bose-Einstein condensate are modelled as spontaneously symmetry breaking minimum energy solutions of the time dependent Gross-Pitaevskii equation, using the method of…
Rotation by shape change, autonomous molecular motors and effective timecrystalline dynamics
Xubiao Peng, Jin Dai, Antti J. Niemi
A deformable body can rotate even with no angular momentum, simply by changing its shape. A good example is a falling cat, how it maneuvers in air to land on its feet. Here a first…
Classical Hamiltonian Time Crystals -- General Theory And Simple Examples
Jin Dai, Antti J. Niemi, Xubiao Peng
We focus on a Hamiltonian system with a continuous symmetry, and dynamics that takes place on a presymplectic manifold. We explain how the symmetry can become spontaneously broken…
Topologically enhanced time crystals and molecular knots
Jin Dai, Xubiao Peng, Antti J. Niemi
A time crystal is a time dependent physical system that does not reach a standstill, even in state of minimum energy. Here we show that the stability of a time crystal can be enhan…
Topological Indices of Proteins
Dmitry Melnikov, Antti J Niemi, Ara Sedrakyan
Protein molecules can be approximated by discrete polygonal chains of amino acids. Standard topological tools can be applied to the smoothening of the polygons to introduce a topol…
Can all-atom protein dynamics be reconstructed from the knowledge of C-alpha time evolution?
Jiaojiao Liu, Jin Dai, Jianfeng He +2
We inquire to what extent protein peptide plane and side chain dynamics can be reconstructed from knowledge of C-alpha dynamics. Due to lack of experimental data we analyze all ato…