4 papers
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…
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.…
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…