109 citations · 372 across the 19 of their papers we have counts for
19 papers
Quantum Eigenvector Continuation for Chemistry Applications
Carlos Mejuto-Zaera, Alexander F. Kemper
A typical task for classical and quantum computing in chemistry is finding a potential energy surface (PES) along a reaction coordinate, which involves solving the quantum chemistr…
A linear response framework for simulating bosonic and fermionic correlation functions illustrated on quantum computers
Efekan Kökcü, Heba A. Labib, J. K. Freericks +1
Response functions are a fundamental aspect of physics; they represent the link between experimental observations and the underlying quantum many-body state. However, this link is…
Low-energy quasi-circular electron correlations with charge order wavelength in
K. Scott, E. Kisiel, T. J. Boyle +20
In the study of dynamic charge order correlations in the cuprates, most high energy-resolution resonant inelastic x-ray scattering (RIXS) measurements have focused on momenta along…
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…
Robust measurements of -point correlation functions of driven-dissipative quantum systems on a digital quantum computer
Lorenzo Del Re, Brian Rost, Michael Foss-Feig +2
We propose and demonstrate a unified hierarchical method to measure -point correlation functions that can be applied to driven, dissipative, or otherwise open or non-equilibrium…
Measuring NISQ Gate-Based Qubit Stability Using a 1+1 Field Theory and Cycle Benchmarking
Kubra Yeter-Aydeniz, Zachary Parks, Aadithya Nair +5
Some of the most problematic issues that limit the implementation of applications on Noisy Intermediate Scale Quantum (NISQ) machines are the adverse impacts of both incoherent and…
Mapping the metal-insulator phase diagram by algebraically fast-forwarding dynamics on a cloud quantum computer
Thomas Steckmann, Trevor Keen, Efekan Kökcü +3
Dynamical mean-field theory (DMFT) maps the local Green's function of the Hubbard model to that of the Anderson impurity model and thus gives an approximate solution of the Hubbard…
Quantum fluctuations of charge order induce phonon softening in a superconducting cuprate
H. Y. Huang, A. Singh, C. Y. Mou +13
Quantum phase transitions play an important role in shaping the phase diagram of high-temperature cuprate superconductors. These cuprates possess intertwined orders which interact…
Flatband-Induced Itinerant Ferromagnetism in RbCoSe
Jianwei Huang, Zhicai Wang, Hongsheng Pang +8
CoSe (=K,Rb,Cs) is a homologue of the iron-based superconductor, FeSe. From a comprehensive study of RbCoSe via measurements of magnetization, tran…
Establishing non-thermal regimes in pump-probe electron-relaxation dynamics
MengXing Na, Fabio Boschini, Arthur K. Mills +8
Time- and angle-resolved photoemission spectroscopy (TR-ARPES) accesses the electronic structure of solids under optical excitation, and is a powerful technique for studying the co…
Enhanced charge density wave coherence in a light-quenched, high-temperature superconductor
S. Wandel, F. Boschini, E. H. da Silva Neto +28
Superconductivity and charge density waves (CDW) are competitive, yet coexisting orders in cuprate superconductors. To understand their microscopic interdependence, a probe capable…
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…
Observation of Chiral Surface Excitons in a Topological Insulator BiSe
H. -H. Kung, A. P. Goyal, D. L. Maslov +5
The protected electron states at the boundaries or on the surfaces of topological insulators (TIs) have been the subject of intense theoretical and experimental investigations. Suc…
Direct determination of mode-projected electron-phonon coupling in the time-domain
MengXing Na, Arthur K. Mills, Fabio Boschini +12
Ultrafast spectroscopies have become an important tool for elucidating the microscopic description and dynamical properties of quantum materials. In particular, by tracking the dyn…
Identifying a forward scattering superconductor through pump-probe spectroscopy
Ankit Kumar, S. Johnston, A. F. Kemper
Electron-boson scattering that is peaked in the forward direction has been suggested as an essential ingredient for enhanced superconductivity observed in FeSe monolayers. Here, we…
Relaxation of nonequilibrium populations after a pump: the breaking of Mathiessens rule
J. K. Freericks, O. Abdurazakov, A. F. Kemper
From the early days of many-body physics, it was realized that the self-energy governs the relaxation or lifetime of the retarded Greens function. So it seems reasonable to dire…
The role of average time dependence on the relaxation of excited electron populations in nonequilibrium many-body physics
A. F. Kemper, H. R. Krishnamurthy, J. K. Freericks
We examine the exact equation of motion for the relaxation of populations of strongly correlated electrons after a nonequilibrium excitation by a pulsed field, and prove that the p…
The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors
J. P. Hinton, E. Thewalt, Z. Alpichshev +14
The condensation of an electron superfluid from a conventional metallic state at a critical temperature is described well by the BCS theory. In the underdoped copper-oxides,…