57 citations · 67 across the 6 of their papers we have counts for
6 papers
Cheaper and more noise-resilient quantum state preparation using eigenvector continuation
Anjali A. Agrawal, João C. Getelina, Akhil Francis +1
Subspace methods are powerful, noise-resilient methods that can effectively prepare ground states on quantum computers. The challenge is to get a subspace with a small condition nu…
Subspace Diagonalization on Quantum Computers using Eigenvector Continuation
Akhil Francis, Anjali A. Agrawal, Jack H. Howard +2
Quantum subspace diagonalization (QSD) methods are quantum-classical hybrid methods, commonly used to find ground and excited state energies by projecting the Hamiltonian to a smal…
An entanglement-based volumetric benchmark for near-term quantum hardware
Kathleen E. Hamilton, Nouamane Laanait, Akhil Francis +8
We introduce a volumetric benchmark for near-term quantum platforms based on the generation and verification of genuine entanglement across n-qubits using graph states and direct s…
Determining ground-state phase diagrams on quantum computers via a generalized application of adiabatic state preparation
Akhil Francis, Ephrata Zelleke, Ziyue Zhang +2
Quantum phase transitions materialize as level crossings in the ground-state energy when the parameters of the Hamiltonian are varied. The resulting ground-state phase diagrams are…
Many Body Thermodynamics on Quantum Computers via Partition Function Zeros
Akhil Francis, D. Zhu, C. Huerta Alderete +6
Interacting quantum systems illustrate complex phenomena including phase transitions to novel ordered phases. The universal nature of critical phenomena reduces their description t…
Quantum computation of magnon spectra
Akhil Francis, J. K. Freericks, A. F. Kemper
We demonstrate quantum computation of two-point correlation functions for a Heisenberg spin chain. Using the IBM Q 20 quantum machines, we find that for two sites the correlation f…