6 papers
General purpose graphical rendering on quantum devices with composable function systems
James Schloss, Ayaka Usui
The controlled creation of specific quantum states is a highly challenging field of research that is also in high demand with applications in various quantum technologies. Due to i…
Topological bound states in a lattice of rings with nearest-neighbour interactions
Yunjia Zhai, Ayaka Usui, Anselmo M. Marques +2
We study interaction-induced bound states in a system of ultracold bosons loaded into the states with orbital angular momentum in a one-dimensional staggered lattice of rings. We c…
Estimating the best separable approximation of non-pure spin-squeezed states
Julia Mathé, Ayaka Usui, Otfried Gühne +1
We discuss the estimation of the distance of a given mixed many-body quantum state to the set of fully separable states, applied to the concrete scenario of collective spin states.…
Entanglement-assisted Hamiltonian dynamics learning
Ayaka Usui, Guillermo Abad-López, Hari krishnan SV +2
Approximating the dynamics given by a complex many-body Hamiltonian with a simpler effective model lies at the interface of quantum Hamiltonian learning and quantum simulation. In…
Spinor Bose-Einstein condensate as an analog simulator of molecular bending vibrations
Ayaka Usui, Artur Niezgoda, Manuel Gessner
We demonstrate that spinor Bose-Einstein condensates (BEC) can be operated as an analog simulator of the two-dimensional vibron model. This algebraic model for the description of b…
Enhanced strong interaction effect in synthetic spin-orbit coupling with mixed spin symmetry
Ayaka Usui, Abel Rojo-Francà s, James Schloss +1
Synthetic spin-orbit coupling in cold atoms couples the pseudo-spin and spatial degrees of freedom, and therefore the inherent spin symmetry of the system plays an important role.…