12 citations · 21 across the 9 of their papers we have counts for
9 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…
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…
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…
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 (BECs) can be operated as an analog simulator of the two-dimensional vibron model. This algebraic model describes bending vibra…
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.…
Enhanced strong interaction effect in synthetic spin-orbit coupling with mixed spin symmetry
Ayaka Usui, Abel Rojo-Francàs, 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.…
Simplifying the simulation of local Hamiltonian dynamics
Ayaka Usui, Anna Sanpera, María García Díaz
Local Hamiltonians, , describe non-trivial -body interactions in quantum many-body systems. Here, we address the dynamical simulatability of a -local Hamiltonian by a si…
Microscopic contributions to the entropy production at all times: From nonequilibrium steady states to global thermalization
Ayaka Usui, Krzysztof Ptaszyński, Massimiliano Esposito +1
Based on exact integration of the Schrödinger equation, we numerically study microscopic contributions to the entropy production for the single electron transistor, a paradigmatic…
Quantum probe spectroscopy for cold atomic systems
Ayaka Usui, Berislav Buča, Jordi Mur-Petit
We study a two-level impurity coupled locally to a quantum gas on an optical lattice. For state-dependent interactions between the impurity and the gas, we show that its evolution…