135 citations · 314 across the 7 of their papers we have counts for
7 papers
Quantifying the effect of gate errors on variational quantum eigensolvers for quantum chemistry
Kieran Dalton, Christopher K. Long, Yordan S. Yordanov +4
Variational quantum eigensolvers (VQEs) are leading candidates to demonstrate near-term quantum advantage. Here, we conduct density-matrix simulations of leading gate-based VQEs fo…
Efficient Parabolic Optimisation Algorithm for adaptive VQE implementations
V. Armaos, Dimitrios A. Badounas, Paraskevas Deligiannis +2
Computational chemistry is one of the most promising applications of quantum computing, mostly thanks to the development of the Variational Quantum Eigensolver (VQE) algorithm. VQE…
Molecular excited state calculations with the QEB-ADAPT-VQE
Yordan S. Yordanov, Crispin H. W. Barnes, David R. M. Arvidsson-Shukur
Calculations of molecular spectral properties, like photodissociation rates and absorption bands, rely on knowledge of the excited state energies of the molecule of interest. Proto…
Qubit-excitation-based adaptive variational quantum eigensolver
Yordan S. Yordanov, V. Armaos, Crispin H. W. Barnes +1
Molecular simulations with the variational quantum eigensolver (VQE) are a promising application for emerging noisy intermediate-scale quantum computers. Constructing accurate mole…
Invariant subspaces of two-qubit quantum gates and their application in the verification of quantum computers
Yordan S. Yordanov, Jacob Chevalier-Drori, Thierry Ferrus +2
We investigate the groups generated by the sets of , and (power-of-SWAP) quantum gate operations acting on qubits. Isomorphisms to standard groups are found…
Efficient quantum circuits for quantum computational chemistry
Yordan S. Yordanov, David R. M. Arvidsson-Shukur, Crispin H. W. Barnes
Molecular quantum simulations with the variational quantum eigensolver (VQE) rely on ansatz states that approximate the molecular ground states. These ansatz states are generally d…
Implementation of a general single-qubit positive operator-valued measure on a circuit-based quantum computer
Yordan S. Yordanov, Crispin H. W. Barnes
We derive a deterministic protocol to implement a general single-qubit POVM on near-term circuit-based quantum computers. The protocol has a modular structure, such that an -ele…