13 citations · 63 across the 13 of their papers we have counts for
13 papers
Entanglement is Half the Story: Post-Selection vs. Partial Traces
Gustav J L Jäger, Krzysztof Bieniasz, Martin B Plenio +1
While tensor networks have their traditional application in simulating quantum systems, in the recent decade they have gathered interest as machine learning models. We combine the…
Iterative Qubit Coupled Cluster using only Clifford circuits
James Brown, Marc P. Coons, Erika Lloyd +4
The performance of quantum algorithms for ground-state energy estimation is directly impacted by the quality of the initial state, where quality is traditionally defined in terms o…
Tangelo: An Open-source Python Package for End-to-end Chemistry Workflows on Quantum Computers
Valentin Senicourt, James Brown, Alexandre Fleury +10
Tangelo [link: https://github.com/goodchemistryco/Tangelo] is an open-source Python software package for the development of end-to-end chemistry workflows on quantum computers, rel…
Theory of dispersive optical phonons in resonant inelastic x-ray scattering experiments
Krzysztof Bieniasz, Steve Johnston, Mona Berciu
The community currently lacks a complete understanding of how resonant inelastic x-ray scattering (RIXS) experiments probe the electron-phonon (-ph) interaction in solids. For e…
Beyond the single-site approximation modeling of electron-phonon coupling effects on resonant inelastic X-ray scattering spectra
Krzysztof Bieniasz, Steven Johnston, Mona Berciu
Resonant inelastic X-ray scattering (RIXS) is used increasingly for characterizing low-energy collective excitations in materials. RIXS is a powerful probe, which often requires so…
Spectral properties of spin-orbital polarons as a fingerprint of orbital order
Krzysztof Bieniasz, Mona Berciu, Andrzej M. Oleś
Transition metal oxides are a rich group of materials with very interesting physical properties that arise from the interplay of the charge, spin, orbital, and lattice degrees of f…
From "Weak" to "Strong" Hole Confinement in a Mott Insulator
Krzysztof Bieniasz, Piotr Wrzosek, Andrzej M. Oles +1
We study the problem of a single hole in an Ising antiferromagnet and, using the magnon expansion and analytical methods, determine the expansion coefficients of its wave function…
Orbiton-magnon interplay in the spin-orbital polarons of KCuF3 and LaMnO3
Krzysztof Bieniasz, Mona Berciu, Andrzej M. Oleś
We present a quasi-analytical solution of a spin-orbital model of KCuF, using the variational method for Green's functions. By analyzing the spectra for different partial bos…
Green's function variational approach to orbital polarons in KCuF3
Krzysztof Bieniasz, Mona Berciu, Maria Daghofer +1
We develop an orbital, --like model of a single charge doped into a two-dimensional plane with ferromagnetic spin order and alternating orbital order, and present its s…
The Green function variational approximation: Significance of physical constraints
Krzysztof Bieniasz, Mona Berciu, Andrzej M. Oleś
We present a calculation of the spectral properties of a single charge doped at a Cu() site of the Cu-F plane in KCuF. The problem is treated by generating the equations…
Polaron states in a CuO chain
Krzysztof Bieniasz, Andrzej M. Oleś
We introduce a one-dimensional model for a CuO chain, with holes and spins localized in orbitals, and oxygen orbitals without holes in the ground state…
Quantum versus classical polarons in a ferromagnetic CuO-like chain
Krzysztof Bieniasz, Andrzej M. Oleś
We present an exact solution for an itinerant hole added into the oxygen orbitals of a CuO-like ferromagnetic chain. Using the Green's function method, the quantum polarons o…
Exact spectral function for hole-magnon coupling in the ferromagnetic CuO-like chain
Krzysztof Bieniasz, Andrzej M. Oleś
We present the exact spectral function for a single oxygen hole with spin opposite to ferromagnetic order within a one-dimensional CuO-like spin chain. We find that local Kon…