5 papers · 1 filter
Efficient Simulation of Sparse, Non-Local Fermion Models
Reinis Irmejs, J. Ignacio Cirac
Efficient simulation of interacting fermionic systems is a key application of near-term quantum computers, but is hindered by the overhead required to encode fermionic operators on…
Quasi-Adiabatic Processing of Thermal States
Reinis Irmejs, Mari Carmen Bañuls, J. Ignacio Cirac
We investigate the performance of an adiabatic evolution protocol when initialized from a Gibbs state at finite temperature. Specifically, we identify the diagonality of the final…
Compiling Quantum Regular Language States
Armando Bellante, Reinis Irmejs, Marta Florido-Llinàs +4
State preparation compilers for quantum computers typically sit at two extremes: general-purpose routines that treat the target as an opaque amplitude vector, and bespoke construct…
Approximating dynamical correlation functions with constant depth quantum circuits
Reinis Irmejs, Raul A. Santos
One of the most important quantities characterizing the microscopic properties of quantum systems are dynamical correlation functions. These correlations are obtained by time-evolv…
Efficient Quantum Algorithm for Filtering Product States
Reinis Irmejs, Mari Carmen Bañuls, J. Ignacio Cirac
We introduce a quantum algorithm to efficiently prepare states with a small energy variance at the target energy. We achieve it by filtering a product state at the given energy wit…