6 papers
Direct fidelity estimation through joint fiducial grouping
Júlia Barberà-Rodríguez, Arthur Strauss
Fault-tolerant quantum computation hinges on the requirement for low physical error rates. Reaching below threshold regime requires the accounting of circuit dependent noise, that…
Strong unitary designs in optimal depth and space
Teodor Parella-Dilmé, Júlia Barberà-Rodríguez, Salvatore F. E. Oliviero +1
Unitary designs provide finite-moment approximations to Haar-random unitaries, with wide-ranging applications across physics and quantum information, from scrambling and black-hole…
Beyond Ground States: Physics-Inspired Optimization of Excited States of Classical Hamiltonians
Erik Altelarrea-Ferré, Júlia Barberà -RodrÃguez, David Jansen +1
We introduce excited local quantum annealing (ExcLQA), a classical, physics-inspired algorithm that extends local quantum annealing (LQA) to identify excited states of classical Is…
Sampling Groups of Pauli Operators to Enhance Direct Fidelity Estimation
Júlia Barberà -RodrÃguez, Mariana Navarro, Leonardo Zambrano
Direct fidelity estimation is a protocol that estimates the fidelity between an experimental quantum state and a target pure state. By measuring the expectation values of Pauli ope…
Boosting projective methods for quantum process and detector tomography
Júlia Barberà -RodrÃguez, Leonardo Zambrano, Antonio AcÃn +1
We introduce two methods for quantum process and detector tomography. In the quantum process tomography method, we develop an analytical procedure for projecting the linear inversi…
Finding dense sub-lattices as low-energy states of a Hamiltonian
Júlia Barberà -RodrÃguez, Nicolas Gama, Anand Kumar Narayanan +1
Lattice-based cryptography has emerged as one of the most prominent candidates for post-quantum cryptography, projected to be secure against the imminent threat of large-scale faul…