activity
20202026
most citedTransition-Potential Coupled Cluster

22 citations · 62 across the 13 of their papers we have counts for

collaborators

15 papers

math.OC2026

A reciprocal graph-deviation functional: structural identifiability from controlled equilibrium maps

Jonathan Washburn, Megan Simons

We constructed a reciprocal graph-deviation functional for positive ratios on a finite weighted graph. Its scalar generator was characterized previously…

physics.chem-ph2026

Molecular Transferability of a Noble-Gas Coordinate for Electronegativity Equalization

Megan Simons, Jonathan Washburn, Elshad Allahyarov

Charge-equilibration models predict how electrons redistribute over a molecule more cheaply than quantum chemistry, and each begins from a table of atomic electronegativities and h…

quant-ph2026

Fixed-order postselected CHSH reference acquisition for parity-constrained spatial-mode qubits on a commercial cloud photonic processor

Emma Tully, Jonathan Washburn, Megan Simons

We report a fixed-order Clauser-Horne-Shimony-Holt (CHSH) acquisition and reporting protocol for two encoded photonic qubits on Quandela's commercial, cloud-accessible Belenos proc…

physics.chem-ph2026

Finite-Resolution Identifiability and Measurement Design for Molecular Conformer Spectroscopy

Megan Simons, Jonathan Washburn

Conformer assignment is meaningful only when the measurement can distinguish the candidate structures. We formulate conformer spectroscopy as a measurement-model-dependent identifi…

physics.chem-ph2026

Auditing Haldane Consistency in Reversible Enzyme Kinetics: A Curated Two-Sided Backbone and a Labeled Fold-Error Benchmark

Megan Simons, Jonathan Washburn

Reversible enzyme kinetic constants can be audited through the Haldane relation: the apparent equilibrium constant implied by the rate law should match biochemical thermodynamics u…

quant-ph2026

Characterization of nested Walsh parity-check filters in a single-photon eight-mode register on a cloud photonic processor

Emma Tully, Jonathan Washburn, Megan Simons

We characterize two nested Walsh parity-check filters implemented on Quandela's Belenos cloud photonic processor in a single-photon eight-mode spatial register. The modes are index…

cond-mat.stat-mech2026

A Finite-Lattice Model from a Reciprocal Cost Action: Spectral and Reflection-Positivity Properties

Jonathan Washburn, Megan Simons

We study the finite-lattice statistical-mechanical model whose nearest-neighbor bond potential is the reciprocal cost , selected by the d'Alemb…

cond-mat.stat-mech2026

A Finite-State Gibbs Construction from a Recognition Cost

Megan Simons, Jonathan Washburn

On a finite outcome space, the canonical Gibbs distribution is usually obtained by maximizing Shannon entropy at fixed mean of an externally supplied energy functional. This paper…

physics.chem-ph2026

A Noble-Gas-Centered Coordinate for Within-Period Atomic Property Trends

Jonathan Washburn, Megan Simons, Elshad Allahyarov

We introduce a single dimensionless landscape function , , on the noble-gas-centred coordinate , and sho…

physics.chem-ph2025

Quantifying the impact of the Tamm-Dancoff approximation on the computed spectra of transition-metal systems

Muhammed A. Dada, Sarah Pak, Matthew N. Ward +2

The Tamm-Dancoff Approximation (TDA) offers a computationally efficient alternative to full linear-response Time-Dependent Density Functional Theory (TDDFT) for calculating electro…

physics.chem-ph2023★ 9 cited

Open-shell Tensor Hypercontraction

Tingting Zhao, Megan Simons, Devin A. Matthews

The extension of least-squares tensor hypercontracted second- and third-order Møller-Plessett perturbation theory (LS-THC-MP2 and LS-THC-MP3) to open-shell systems is an important…

physics.chem-ph2023★ 4 cited

Transition moments for STEOM-CCSD with core triples

Megan Simons, Devin A. Matthews

Similarity transformed equation-of-motion coupled cluster theory (STEOM-CC) is an alternative approach to equation-of-motion coupled cluster theory for excited states (EOMEE-CC) wh…

physics.chem-ph2022★ 10 cited

Transition-Potential Coupled Cluster II: Optimization of the Core Orbital Occupation Number

Megan Simons, Devin A. Matthews

The issue of orbital relaxation in computational core-hole spectroscopy, specifically x-ray absorption, has been a major problem for methods such as equation-of-motion coupled clus…

physics.chem-ph2022★ 17 cited

Accurate core-excited states via inclusion of core triple excitations in similarity-transformed EOM theory

Megan Simons, Devin A. Matthews

The phenomenon of orbital relaxation upon excitation of core electrons is a major problem in the linear-response treatment of core-hole spectroscopies. Rather than addressing relax…

physics.chem-ph2020★ 22 cited

Transition-Potential Coupled Cluster

Megan E. Simons, Devin A. Matthews

The problem of orbital relaxation in computational core-hole spectroscopies, including x-ray absorption and x-ray photoionization, has long plagued linear response approaches, incl…