Alberto Nocera
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View article: Belief Propagation TNS data sets
Belief Propagation TNS data sets Open
Contains code as well as stored wave-functions and measured correlations for Diamond and 3D Dimer Cubic spin glass Ising lattices in fast anneals (only 10 instances of disordered couplings, various system sizes).
View article: Left-left-right-right magnetic order in spin-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mfrac><mml:mn>1</mml:mn><mml:mn>2</mml:mn></mml:mfrac></mml:math> Kitaev-Heisenberg chain
Left-left-right-right magnetic order in spin- Kitaev-Heisenberg chain Open
In this work, we perform a combination of analytical and numerical studies on the phase diagram of the spin-1/2 Kitaev-Heisenberg chain in the region of negative Kitaev and positive Heisenberg couplings. Apart from the antiferromagnetic ph…
View article: Spectral signatures of residual electron pairing in the extended Hubbard Su-Schrieffer-Heeger model
Spectral signatures of residual electron pairing in the extended Hubbard Su-Schrieffer-Heeger model Open
We study the electron addition spectrum of the one-dimensional extended Hubbard-Su-Schrieffer-Heeger (HSSH) model in the dilute limit using the density matrix renormalization group method. In addition to the expected renormalization to the…
View article: Quantum dynamics in frustrated Ising fullerenes
Quantum dynamics in frustrated Ising fullerenes Open
The complex energy landscapes exhibited by frustrated magnetic systems undergoing quantum fluctuations are a challenge to accurately simulate, and thus of great interest for testing diverse qubit platforms in the field of quantum simulatio…
View article: Theory of Electron-Phonon Interactions in Extended Correlated Systems Probed by Resonant Inelastic X-Ray Scattering
Theory of Electron-Phonon Interactions in Extended Correlated Systems Probed by Resonant Inelastic X-Ray Scattering Open
An emerging application of resonant inelastic x-ray scattering (RIXS) is the study of lattice excitations and electron-phonon (e-ph) interactions in quantum materials. Despite the growing importance of this area of research, the community …
View article: Beyond-classical computation in quantum simulation
Beyond-classical computation in quantum simulation Open
Quantum computers hold the promise of solving certain problems that lie beyond the reach of conventional computers. However, establishing this capability, especially for impactful and meaningful problems, remains a central challenge. Here,…
View article: Tensor networks for quantum computing
Tensor networks for quantum computing Open
In the rapidly evolving field of quantum computing, tensor networks serve as an important tool due to their multifaceted utility. In this paper, we review the diverse applications of tensor networks and show that they are an important inst…
View article: Quantum error mitigation in quantum annealing
Quantum error mitigation in quantum annealing Open
Quantum error mitigation (QEM) presents a promising near-term approach to reducing errors when estimating expectation values in quantum computing. Here, we introduce QEM techniques tailored for quantum annealing, using zero-noise extrapola…
View article: Frustrated S = 1/2 Chains in One-Dimensional Correlated Metal Ti4MnBi2
Frustrated S = 1/2 Chains in One-Dimensional Correlated Metal Ti4MnBi2 Open
Electronic correlations lead to heavy quasiparticles in three-dimensional (3D) metals, and their collapse can destabilize magnetic moments. It is an open question whether there is an analogous instability in one-dimensional (1D) systems, u…
View article: Quantum quench dynamics of geometrically frustrated Ising models
Quantum quench dynamics of geometrically frustrated Ising models Open
View article: Identifying and quantifying Su-Schrieffer-Heeger-like interactions with RIXS
Identifying and quantifying Su-Schrieffer-Heeger-like interactions with RIXS Open
Su-Schrieffer-Heeger (SSH)-like electron-phonon (e-ph) interactions can drive the formation of light (bi)polarons and several novel states of matter. It is, therefore, prudent to develop experimental protocols for identifying such coupling…
View article: Theory of electron-phonon interactions in extended correlated systems probed by resonant inelastic x-ray scattering
Theory of electron-phonon interactions in extended correlated systems probed by resonant inelastic x-ray scattering Open
An emerging application of resonant inelastic x-ray scattering (RIXS) is the study of lattice excitations and electron-phonon ($e$-ph) interactions in quantum materials. Despite the growing importance of this area of research, the communit…
View article: Nonsymmorphic spin-space cubic groups and SU(2)$_1$ conformal invariance in one-dimensional spin-1/2 models
Nonsymmorphic spin-space cubic groups and SU(2)$_1$ conformal invariance in one-dimensional spin-1/2 models Open
Recently, extended gapless phases with emergent SU(2) _1 conformal invariance occupying finite regions in the phase diagrams have been found in one-dimensional spin-1/2 models with nonsymmorphic O_h symmetry groups. In this work, we…
View article: Signature of preformed pairs in angle-resolved photoemission spectroscopy
Signature of preformed pairs in angle-resolved photoemission spectroscopy Open
We use density matrix renormalization group (DMRG) and variational exact diagonalization (VED) to calculate the single-electron removal spectral weight for the Hubbard-Holstein model at low electron densities. Tuning the strength of the el…
View article: Beyond-classical computation in quantum simulation
Beyond-classical computation in quantum simulation Open
Quantum computers hold the promise of solving certain problems that lie beyond the reach of conventional computers. However, establishing this capability, especially for impactful and meaningful problems, remains a central challenge. Here,…
View article: Quantum Quench Dynamics of Geometrically Frustrated Ising Models
Quantum Quench Dynamics of Geometrically Frustrated Ising Models Open
Geometric frustration in two-dimensional Ising models allows for a wealth of exotic universal behavior, both Ising and non-Ising, in the presence of quantum fluctuations. In particular, the triangular antiferromagnet and Villain model in a…
View article: Transition to the Haldane phase driven by electron-electron correlations
Transition to the Haldane phase driven by electron-electron correlations Open
View article: Auger spectroscopy beyond the ultra-short core-hole relaxation time approximation
Auger spectroscopy beyond the ultra-short core-hole relaxation time approximation Open
View article: Quantum error mitigation in quantum annealing
Quantum error mitigation in quantum annealing Open
Quantum Error Mitigation (QEM) presents a promising near-term approach to reduce error when estimating expectation values in quantum computing. Here, we introduce QEM techniques tailored for quantum annealing, using Zero-Noise Extrapolatio…
View article: A time-dependent momentum-resolved scattering approach to core-level spectroscopies
A time-dependent momentum-resolved scattering approach to core-level spectroscopies Open
While new light sources allow for unprecedented resolution in experiments with X-rays, a theoretical understanding of the scattering cross-section is lacking. In the particular case of strongly correlated electron systems, numerical techni…
View article: Electron addition spectral functions of low-density polaron liquids
Electron addition spectral functions of low-density polaron liquids Open
Spectral functions are important quantities that contain a wealth of information about the quasiparticles of a system, and that can also be measured experimentally. For systems with electron-phonon coupling, good approximations for the spe…
View article: Report on 2303.05013v2
Report on 2303.05013v2 Open
Spectral functions are important quantities that contain a wealth of information about the quasiparticles of a system, and that can also be measured experimentally.For systems with electron-phonon coupling, good approximations for the spec…
View article: Report on 2303.05013v2
Report on 2303.05013v2 Open
Spectral functions are important quantities that contain a wealth of information about the quasiparticles of a system, and that can also be measured experimentally.For systems with electron-phonon coupling, good approximations for the spec…
View article: Auger spectroscopy beyond the ultra-short core-hole relaxation time approximation
Auger spectroscopy beyond the ultra-short core-hole relaxation time approximation Open
We present a time-dependent computational approach to study Auger electron spectroscopy (AES) beyond the ultra-short core-hole relaxation time approximation and, as a test case, we apply it to the paradigmatic example of a one-dimensional …
View article: "Transition to the Haldane phase driven by electron-electron correlations"
"Transition to the Haldane phase driven by electron-electron correlations" Open
Dataset (Fig.1-Fig.5) for "Transition to the Haldane phase driven by electron-electron correlations"
View article: "Transition to the Haldane phase driven by electron-electron correlations"
"Transition to the Haldane phase driven by electron-electron correlations" Open
Dataset (Fig.1-Fig.5) for "Transition to the Haldane phase driven by electron-electron correlations"
View article: "Transition to the Haldane phase driven by electron-electron correlations"
"Transition to the Haldane phase driven by electron-electron correlations" Open
Dataset (Fig.1-Fig.5) for "Transition to the Haldane phase driven by electron-electron correlations"
View article: Transition to the Haldane phase driven by electron-electron correlations
Transition to the Haldane phase driven by electron-electron correlations Open
One of the most famous quantum systems with topological properties, the spin $\mathcal{S}=1$ antiferromagnetic Heisenberg chain, is well-known to display exotic $\mathcal{S}=1/2$ edge states. However, this spin model has not been analyzed …
View article: Electron addition spectral functions of low-density polaron liquids
Electron addition spectral functions of low-density polaron liquids Open
This folder contains the DMRG data/scripts to reproduce our spectral function figures in our paper at https://arxiv.org/abs/2303.05013 Instructions can be found in the Supplemental Material of the paper (included, supplemental.pdf) Raw DMR…
View article: Electron addition spectral functions of low-density polaron liquids
Electron addition spectral functions of low-density polaron liquids Open
This folder contains the DMRG data/scripts to reproduce our spectral function figures in our paper at https://arxiv.org/abs/2303.05013 Instructions can be found in the Supplemental Material of the paper (included, supplemental.pdf) Raw DMR…